ratio: consultants is more than a group of talented planners and engineers – we are great to work with.


Hilary Marshall


B.Eng. Civil. B.Bus Admin (RMIT)

Hilary has extensive experience as a Traffic and Transport Engineer and brings enormous value to our team and to our clients. Hilary is a highly respected professional and has developed a diverse skill set during her work at Grogan Richards, a stint overseas and most recently at Cardno.
Hilary’s expertise includes preparation of Traffic Impact Assessments for the full range of development proposals, including traffic planning and design for major residential and industrial subdivisions, but particularly enjoys preparation of expert evidence and presentation to both VCAT and Planning Panels Victoria.


Russell Fairlie


B.Eng. Civil (Monash), M.Eng. Sci (Monash),

Russell Fairlie is a Director at ratio:consultants with key responsibilities in the area of Transport Engineering and Sustainable Transport Planning. Russell has over thirty five years experience in a diverse range of traffic and transport related areas, gained during his extensive experience in consulting, local government and VicRoads.  

Russell has been directly involved in a wide range of significant development and urban renewal projects. He provides high level professional advice to the firm's clients, including leading architectural and planning firms across Melbourne. 

Russell is a highly successful expert at VCAT and appears there on a regular basis.


Simon Martin


BAppSci (Plan)(Hons)RMIT

Simon Martin is a statutory planner with over 14 years’ experience working in both the public and private sector in Australia and the UK.

Simon has significant expertise in all stages of the property development lifecycle, and enjoys working with his clients to achieve the best possible results.  Simon has a firm understanding of the commercial practicalities associated with developments of all sizes, and firmly understands the processes involved in achieving good development outcomes.    

Simon has comprehensive knowledge of the Victorian Planning System, and has a strong passion for residential, commercial, mixed-use, and industrial land use planning.  Simon’s focus is on providing sound planning advice and project managing applications through the town planning life cycle.  Simon often represents clients as an advocate at VCAT


Brett Young


B Eng.

Brett is a traffic and transport specialist. He regularly appears before VCAT as an expert witness and works on a variety of projects including strategic transport studies and traffic and transport planning for private developers.

Brett relishes the challenge of achieving great results for even the most complex projects and his excellent project management skills and creative approach enable him to successfully deliver those results.

Senior Associate

Alice Maloney


BUPD Melbourne 2003

Alice joined ratio: in August 2009 and has experience of working in both public and private sectors, including project management at a major construction company.

Alice is experienced across a range of planning projects, including facilitating multi-residential, commercial, institutional and industrial developments. In addition to these fields includes the preparation of cumulative impact assessments for liquor licencing and master planning/preparation of development plans for institutional uses or large sites.

Alice has an excellent ability to provide succinct due diligence advice, liaise effectively with relevant stakeholders and efficiently manage project teams ensures clients get results. 

Senior Associate

Chris Greenland


BEng (Civil) (Hons) Monash 2008
BSc (Astrophysics & Atmospheric Science) Monash 2008

Chris is a specialist transport planner who is passionate about creating well-reasoned, pragmatic outcomes according to key stakeholder and community transport planning requirements.

With over 13 years’ experience, his primary skillset sits within integrated land use planning and management of various disciplines (transport engineers, planners, microsimulation modellers, active transport planners and technical designers) to achieve aspirational outcomes for transport projects.

Chris is also an experienced Expert Witness at the Victorian Civil and Administrative Tribunal (VCAT) where he has provided independent and specialist transport advice for clients and development partners.


Gokhan Karpat


Master of Urban Design, Bachelor of Town Planning

Gokhan is an Urban Designer with 10 years’ experience both in local government and the private sector.

Gokhan is responsible for the management and strategy development of Urban Design components in projects.

His skillset lies specifically in strategic planning, urban design and strategy development. He excels in this by utilising design-related programs and technologies, enabling him to prepare documents of high-level complexity and accuracy.

Gokhan’s expertise also spans a broad spectrum of 3D modelling, photomontage preparation and visual impact assessment.


James McKenzie


BEng (Civil) (Hons) – University of Melbourne

James is an Associate Transport Engineer with extensive experience in preparing Traffic Impact Assessment reports, Traffic Expert Evidence statements and Planning Panel reports for a range of developments across the residential and commercial sectors. He‘s able to quickly understand the various constraints and considerations of each individual project, and is driven to achieve the best possible outcome for his clients.

James has a comprehensive understanding of the Victorian Civil and Administrative Tribunal (VCAT) system as it relates to traffic engineering, primarily via the preparation of Traffic Expert Evidence statements for some of Victoria’s leading industry experts. He has also begun his career as a Traffic Expert, first appearing before the tribunal in August 2018. James seeks to continually develop his experience and skill set and aspires to establish himself as a leading Traffic Expert at VCAT.


Dean Savage


MSocSc (Environment & Planning) R.M.I.T. 2009 
B.A. (Journalism and International Relations) Deakin 1997

Dean joined ratio: in October 2017, with over 9 years’ experience working not only in planning but as a journalist and political adviser.

Dean has managed varied planning permit applications including residential, industrial, retail and commercial developments and has experience and knowledge in;

  • Preparation of planning permit applications
  • Preparation and presentation of submissions to VCAT and Planning Panels Victoria
  • Interpretation and application of the Victorian Planning Provisions (VPPs)
  • Public consultation and mediation
  • Preparation of planning scheme amendments and due diligence planning reports 

Claire Whelan


B.App.Sci (Planning) (RMIT)

Claire has over 10 years' planning and urban design experience across both the public and private sector. Since joining Ratio Claire has predominantly specialised in residential development, whilst also enjoying the variety of work which consultancy provides.

Claire is passionate about architecture, high quality design and public spaces and has volunteered with the Robin Boyd Foundation and Open Houses Melbourne. She is currently on the Property Council Residential Infill Committee and the VPELA Conference Committee.

After taking some time off to travel and work overseas, Claire returned in mid-2020 to join Ratio’s growing urban design team. She continues to utilise her combined urban design and planning knowledge to manage planning applications, provide urban design advice and assist with the preparation of urban design expert evidence.

Senior Traffic Engineer

Sam Lewis


Bachelor of Science (Geography), University of Plymouth

Sam joined ratio: in 2017 as a Traffic Engineer and works in Ratio’s Traffic Engineering section. Through being involved in a range of different projects within Australia and the United Kingdom, Sam has a broad range of applicable skills which enables him to work on an array of project types.

Sam has extensive experience in preparing a variety of Traffic Reports for a range of developments across the residential and commercial sectors. He takes pleasure in working through complex and difficult traffic issues, and enjoys working closely with his clients and project team in order to achieve the best possible outcome.

Senior Planner

Lewis Moore


B (Urban & Regional Planning) (RMIT, 2018)

Lewis is a senior planner who joined ratio: in 2021 after working in local government for four years.

Through his work on a variety of planning & design projects, Lewis has a range of experience in a range of planning matters including residential, commercial and industrial development, in addition to working on various heritage matters.

Lewis’ passion is contributing to cities where people feel naturally and socially embedded in their environment.

Environmental Consultant

Lachlan Harris


BEnvSc, RMIT University

Lachlan joined ratio: in 2021 and has over three years’ experience of environmental consulting in waste management for new developments.

Lachlan has an in-depth understanding of waste management principles and is committed to helping clients overcome challenges to find the best possible waste management solution. He has been involved in waste management solutions for new developments Australia wide such as high-rise buildings, shopping centres, stadiums and housing estates.

Lachlan is passionate about the environment andimplementing waste management best practices that will help move us towards a circular economy.

Chief Executive Officer

Colleen Peterson


B.P.D. (Hons) (Melb)

Colleen has over 24 years of experience leading statutory and strategic planning projects for both private and public clients.

Colleen regularly appears as an expert witness for VCAT and panel hearings and is an active participant in the professional development of the industry, its representative organisations and tertiary education in Victoria.  Colleen has been a leading force in the planning industry’s opposition to the extensive rollout of the Neighbourhood Residential Zone and regularly appears in the media on this and other planning related issues.

In addition to her planning expertise and passion for the built environment, she has developed a specialisation in social and economic impact assessments and liquor related matters and is a highly regarded expert in these areas.

She loves applying her lateral thinking skills to complex planning issues.


William Bromhead


B.App.Sci (Planning) (RMIT)

For over 20 years, William has worked on strategic and statutory planning projects with both public and private clients. He regularly appears as an expert witness for VCAT and panel hearings.

William has an intimate knowledge of the planning permit application process and planning scheme amendment process. He has developed an extensive network of contacts in local and state government as well as the private sector. William’s experience covers residential, commercial, industrial and retail planning projects.

He loves the satisfaction of attaining planning approvals and aims to show his clients the positive sides of the planning process! 


David Crowder


B.T.R.P. (Hons) (Melb)

David has over 25 years’ experience in town planning working with a diverse group of clients including developers, architects and designers, local government and corporate groups.

He specialises in statutory planning and providing expert evidence before the VCAT and Planning Panels forums. 

What David enjoys most about working at ratio: is taking on new challenges and devising the most appropriate strategies for achieving successful outcomes.


Travis Finlayson


B.Arts (Melb) P.G.Dip (Planning & Design - Urban planning) (Melb) 

Travis is an urban planner who has a variety of experience with residential, industrial, commercial, rural, gaming and licensed premises projects.

Travis appears at the Victorian Civil and Administrative Tribunal as an expert and provides advice and management of planning permit applications through the Council process.

Travis is focussed on achieving positive outcomes for his clientele.


Robbie McKenzie


B.App.Sci (Planning) (RMIT)

Robbie is an accomplished urban planner with over 15 years' experience providing expert advice on a diverse and complex range of projects covering the residential, commercial, hospitality and industrial sectors.

Robbie is regarded as a ‘planning technician’ and drawing on his knowledge of the legal and policy framework of Victoria, he is able to formulate strategies and considered advice to his clients with a focus on achieving optimal land use outcomes.

Robbie prides himself on understanding the specific needs of his clients and with his results driven attitude the ultimate success of every project, however big or small, brings him immense satisfaction.

Robbie regularly appears as an advocate at VCAT hearings and compulsory conferences, as well as Planning Panels. 


Steve Hunt


B.Eng. Civil (Swinburne) Grad Dip H.T.E. (Caulfield)

Steve Hunt joined ratio: in mid-January 2017. Steve has had an eminent career spanning more than 35 years in the Traffic and Transport consulting field, including 28 years with the former Grogan Richards and Cardno. Beginning his career as a traffic engineer in 1975, Steve worked for several metropolitan Councils before joining Grogan Richards in 1988.

Steve’s knowledge and expertise extends across strategic and statutory traffic and transport areas and he is a leading industry expert. His experience includes due-diligence and feasibility studies, managing/directing traffic analysis, preparing traffic and transport studies and the presentation of expert evidence at VCAT and Planning Panels Victoria. He has been instrumental in delivering high profile projects across Melbourne including the development of Caroline Springs, Roxburgh Park, Mernda and Cabrini Hospital.


Senior Associate

Blanche Manuel


B (Planning & Design) Melbourne 2009

Blanche joined ratio: in September 2015 and has over 10 years' experience as a planning consultant.
Blanche’s experience includes working on a variety of planning projects across Melbourne, including facilitating approvals for a range of developments across the residential and commercial markets.
Blanche has highly developed interpersonal and negotiation skills, is extremely proactive with managing her projects and has an ability to identify and implement timely and practical solutions to issues encountered as part of the planning process.


Claire Helfer


BSocSc(Env)   MSocSc(Env&Plan)

Claire joined ratio: in October 2015 after working in local government for over 4 years. She has developed a skill set in technical application, stakeholder negotiations and coordination.

Claire has a range of experience in local government across the residential and commercial markets providing her with sound insights into the planning process and framework, and enabling her to manage a range of stakeholders.

Claire has advocacy experience, appearing at the Victorian Civil and Administrative Tribunal. Claire is passionate about planning and strives to always achieve the best planning outcomes for clients.  


Ben Krastins


Bachelor of Engineering (Civil) (Hons) Deakin University

Ben is a Associate Transport Planner and Engineer with over 8 years’ experience in Geelong and Melbourne, working in both the public and private sectors.

During this time, Ben has worked on a diverse range of transport projects, including undertaking transport impact assessments, strategic transport planning, parking policy development, financial modelling and facilitating complex community and stakeholder engagement activities.

Ben is passionate about the important role transport plays in unlocking land use objectives. He strongly believes in the need to plan for people and not just vehicles, to create the great places we live, work and visit.


Stuart McKenzie



Stuart joined ratio: in November 2020 with over 14 years’ experience as a Traffic Designer.

Stuart has a wide range of skills working on a variety of projects throughout Australia for a diverse range of clients including various state and local road authorities, alliances and private developers.

Stuart’s experience covers major road projects, PSP subdivisions, shopping centre upgrades, arterial road duplications, freeway interchange design, roundabout design and traffic signal plans.



Mitch Seach


B (Urban & Regional Planning) (RMIT, 2012)
Certificate IV Business Administration

Mitch has extensive knowledge of statutory planning processes which have been gained through 5 years' experience with the City of Greater Dandenong Council, Whitehorse City Council and Knox City Council.

Mitch has a particular interest in presenting at the Victorian Civil and Administrative Tribunal, which he has done so for a variety of application types with varying degrees of complexity.

He has broad experience in handling application types for residential, rural, commercial, industrial, and subdivision projects. 

Senior Planner

Chun Guo


Master of Urban Planning, The University of Melbourne
Bachelor of Engineering (Urban Planning), Jilin Jianzhu University

With both local and international qualifications in town planning, and more than five years’ experience, Chun has been involved in a broad range of statutory and strategic planning matters in Australia. She is passionate about residential projects as well as Aged care and childcare facilities; Industrial use and development, Commercial use and development, and large scale subdivision developments.

In addition, Chun has a well-developed understanding of urban planning and design for different cultural backgrounds and has studied and worked in both China and India.

She is client-focused and works closely with clients to achieve exceptional outcomes in planning and development. She is passionate about solving problems for her clients. As she is bilingual, you are welcome to contact her in either English or Chinese.

Senior Traffic Engineer

Ben Thomson


Bachelor of Civil Engineering (Hons)
Road Safety Auditor (SSS/VicRoads)
Registered Construction Traffic Management Planner (CCF Victoria)

Ben is a Senior Transport Engineer with a diverse professional background in both construction and consultancy. Ben’s skillset lies in people-oriented transport, with experience in Transport Impact Assessments, Green Travel Plans, Bicycle and End of Trip Design and Green Star Assessments. He regularly provides holistic transport engineering advice for projects from greenfield subdivisions to inner city residential and commercial developments. Ben has a comprehensive understanding of the traffic and transport regulations, and is able to deliver balanced transport solutions for liveable, equitable and connected spaces.

Ben also leads the ratio: construction traffic management team, taking projects from the town planning stages to implementation. With on-site expertise, Ben provides quality risk management and strategy advice for the worksite interface, to ensure developers are able to separate the public realm and site activity.

Ben is an active member in the wider transport industry and is currently a committee member of the UDIA Outlook Committee and board member of the Institute of Transportation Engineers ANZ (ITE-ANZ).

Senior Planner

Erica Orfanos


B (Urban Design & Planning), Melbourne 2018

Erica graduated with a Bachelor of Environments majoring in Urban Design and Planning from the University of Melbourne in 2018. With her studies she travelled abroad to India to work on humanitarian urban design projects and facilitate community consultation programs. Previously, Erica worked as a student in local government and now translates her planning knowledge to her current role as a Senior Planner/Urban Designer.

Erica’s experience extends across a variety of projects from medium density housing and subdivision design to built form analysis and visual impact assessment work. Along with preparing expert evidence statements and planning permit applications, Erica makes valuable contributions to projects in providing conceptual graphic works to complement urban design and planning advice.

Urban Designer

Clare McAllister


MPhil (Urban Design) Melbourne
B (Architecture) (Hons, First Class), B (Building Science) Victoria University, Wellington

Clare has more than 30 years’ experience in architectural practice and urban design, as Director at Neometro Architects, then Design Director at McAllister Alcock Architects (MAA). In 2019 Clare commenced sole practice to combine architectural practice and urban-design consulting with part-time study, completing a post-graduate urban design research degree investigating the important street-level public-private interface.

 As a multi-award winning, industry-leading architect and urban designer, Clare has extensive experience in multi-unit residential and mixed-use projects, with a focus on design quality. Clare joined ratio: in 2021 and brings her design review expertise, along with an understanding of the pragmatic aspects of commercial development, to provide urban design advice to clients ,and expert evidence to the Victorian Civil and Administrative Tribunal.

Managing Director



MBus (LogMgt) (RMIT)

Peter has more than 25 years’ management experience in the Construction Materials and Professional Services industries in both small business and global companies, small and large, local and international teams and across a broad range of business disciplines.

As an experienced and accredited executive coach, he brings together his passion for people and business to drive a high performance culture underpinned by a commitment to client service excellence and staff engagement.  

Peter combines his love of coffee and communication in meeting regularly to mentor and coach staff, and meeting clients to seek opportunities to continuously improve the service ratio: provides.


Catherine Heggen



Catherine’s 35-year career has been devoted to the provision of project based consulting advice to a wide range of private sector and government clients. Her professional capabilities and experience lie at the intersection of urban planning, statutory control, place making and project facilitation.

Catherine’s experience extends across all aspects of development planning, from high rise inner city apartment complexes, medium density housing projects as well as delivery of social housing models, built form impact analysis and urban design appraisals, innovative greenfield subdivision and ‘environmental living’ communities, institutional master plans and environment impact assessments.

Catherine is the author of professional papers and articles including ‘A Walk on the Wild Side’. The paper was presented at the Victorian Planning and Environmental Law Association Conference 2018.

Catherine has particular skills in development planning often involving urban design, heritage issues and visual landscape impact assessments. She has been Chair of Victoria’s Heritage Council, a Trustee of Melbourne’s Heritage Restoration fund and a jury member of various urban design, planning and landscape institute awards.


Sam D'Amico


BA (Urban and Regional Planning) (VUT)

Sam provides high-level advice on strategic and statutory planning projects. He is interested in using his work as a planner to help shape and improve our urban and public spaces, villages and city centres.

Sam regularly appears as an expert witness before the Victorian Civil and Administrative Tribunal (VCAT) and panels.

Sam has a broad range of experience in both local government and private practice. No matter how big or how small, Sam’s ultimate reward is seeing the projects he’s worked on fully constructed.


Tim Biles



Tim has 40 years experience in town planning and urban design throughout Victoria and is a recognised leader in these fields. He provides planning, urban design advice, and also delivers expert evidence to VCAT and Planning Panels.

Tim was a member of Minister Delahunty’s Industry Round Table (2003- 2004); Chairman of Melbourne University Course Advisory Board (2000- 2003); Sessional Member of Panels Victoria and founding joint Editor of Planning News (circa 1974) and Planning Aid (1973).

Tim’s focus is on developing innovative and achievable solutions for often complex and difficult development issues. He has particular skills in the formulation of ‘place making’ strategies and devising design-led planning solutions. He is dedicated to making planning processes work to achieve community benefit often preceded by focused consultation carried out by the firm with others specialising in this arena. He regularly works with architects, landscape architects and designers in a collaborative approach to resolving site solutions that are responsive to context and to planning policy.


Aaron Walley


B.Eng. Civil.(Hons) (RMIT)

Heading our Geelong office, Aaron provides high level professional advice to ratio: clients across a wide range of projects.

With over 16 years' experience, Aaron is sought after for major greenfield and redevelopment applications locally and inter-state and has wide-ranging experience across residential, industrial, retail and commercial developments.

With an acute understanding and appreciation of macro and micro traffic and transport issues, Aaron is able to provide robust and considered advice ranging from strategic transport matters, feasibility and due diligence studies, to detailed technical advice as part of design development and project delivery. He has an excellent understanding of town planning and statutory processes as they relate to traffic and transport engineering, and routinely prepares expert evidence and acts as an expert traffic witness at both VCAT and Planning Panels Victoria.

Key project experience includes the Dundonnell Wind Energy Facility project, Australia 108 Tower and acting as the lead traffic consultant within the project teams across four precinct structure plan areas within the Armstrong Creek Urban Growth Area.

Senior Associate

Peter Malley


B.Eng.(Civil) (Hons)(Monash)

Peter believes the transport system is not just limited to traffic activity and car parking demands. He understands that a holistic approach is required in transport planning, including consideration of land use, opportunities for public transportation, bicycle accessibility, pedestrian amenity and walkability, logistics management and travel demand management.

He has contributed to a wide range of significant traffic engineering and planning projects including local and state government projects, residential subdivisions, town centres and shopping centres, schools and universities, medical and health precincts, and high-density residential projects.

Peter works closely with clients to achieve exceptional outcomes in traffic and transport assessment, design and management by utilising creative design responses and effective resource management.

Senior Associate

Mathew Furness


MA (Hons) Town Planning

Mathew is a highly skilled urban planner with 15+ years’ experience across both the private and government sector in Australia and the UK. He has deep expertise in both statutory and strategic planning, encompassing a broad spectrum of land use and development types and scales.

Mathew’s skill set encompasses statutory planning and project formulation advice, the management of complex projects, strategic plan preparation and placemaking, urban renewal and community engagement. Mathew also assists the Directors in the preparation of expert evidence statements for a range of VCAT matters and Panel Hearings, as well as appearing as an expert and advocate in his own right.

Mathew has a particular interest in urban strategy and design issues. His experience in the Victorian planning system has involved advice and project facilitation for a range of medium and high density residential developments, institutional buildings, commercial and retail developments and cultural uses, for a range of clients.


Henry Johnstone


B(Hons) (Urban & Regional Planning) (RMIT, 2015)

Henry Johnstone is a Senior Town Planner who began his career working with the Boroondara City Council where he developed a sound knowledge of the inner-workings of local government, as well as the processes required for a timely decision of a planning permit. 

Henry works with a range of cliental in both the public and private sector, which includes a mix of residential and commercial applications ranging in scale and complexity. 

Henry enjoys working closely with his clients and project team in order to achieve the best possible outcome through Council, and takes pleasure in the opportunity to work through complex and difficult planning situations.



Edelene Loke


BUPD Melbourne 2003

Edelene joined ratio: in April 2017 with over 15 years town planning experience in both the public and private sector. She has a thorough appreciation and understanding of the planning application process and the strategies required to achieve successful results. 

Her local government experience stems from working in various municipalities and she has a thorough appreciation of Council policies and procedures. Edelene has worked on a wide range of projects, and gained invaluable experience across commercial, industrial and residential planning matters.
She regularly appears at the Victorian Civil and Administrative Tribunal as an advocate for local government and private sector clients.
She is client focussed and strives to manage and deliver the best outcomes for them.


Manesha Ravji


B.Eng. Civil, University of Canterbury, New Zealand (2002)

Manesha joined ratio: in 2019 with over 14 years’ of consulting experience in the field of traffic engineering and transport planning, and has worked for a broad cross-section of clients across the Australasian private and public sector.

She has particular expertise in the fields of land use planning and transport modelling. Manesha has led strategic modelling and planning projects for new communities in Melbourne’s growth areas and intensification of development in existing built up areas.

In her roles managing teams, she has been responsible for client liaison, stakeholder presentations, negotiations with approval authorities, review and quality assurance of outputs, and guiding and mentoring junior team members.


Hayley Vinecombe


B.A (Hons) Geography    B.A Geography & Political Studies

Hayley joined ratio: in 2008 having previously worked in the transport planning sector within Local Government in her native NZ, and in both Local and State Government in Melbourne. With an additional 10 years’ experience in the private sector, Hayley brings a unique perspective to her role as an Associate: Planning.

Hayley has a broad range of statutory planning experience, with special interest in residential and child care developments. She has valuable knowledge and expertise in the preparation and delivery of Social and Economic Impact Statements, and has a thorough understanding of key issues and ways in which to overcome obstacles. Hayley is committed to achieving the best outcome for clients through positive communication and negotiation.

Senior Traffic Engineer

Lina Inglis


Bachelor of Architectural Engineering(Hons.), University of Adelaide

Lina is a Senior Transport Engineer with experience in a range of projects including traffic modelling of large mixed use precincts and residential estates in Greenfields areas and assisting in the preparation of VCAT expert evidence statements for a variety of development types. Lina has conducted design reviews and prepared Traffic Impact Assessments of a variety of uses, has conducted traffic as well as transport reviews for Council to inform rezoning of land uses.

Lina is currently a committee member of the Victorian Planning and Environmental Law Association (VPELA) Young Professionals Group (YPG).

Senior Planner

Jack Lyons


B (Urban & Regional Planning) (Hons) RMIT 2018

Jack is a town planner who joined ratio: in 2018. Through his work on a variety of statutory and strategic projects, Jack continues to develop a wide range of skills in planning. Jack has been involved in a range of planning matters including residential, commercial and greenfield development, in addition to working on various heritage matters.

Environmental Consultant

Mitchell Fairlie


BEnvSc(Wild&ConsBiol), Deakin University

Mitch joined ratio: in 2018 and has been involved in a diverse range of projects across all sectors, with extensive experience in waste management planning for residential apartment buildings, office and retail developments, and child care centres.

He is particularly passionate about waste minimisation and sustainable waste management practices, including the on-site processing and reuse of food organics and the separation of recyclables at the source.

Mitch has an in-depth understanding of best practice principles and Council requirements, and strives to provide clients with valuable and practical waste management solutions.

Urban Designer

Ariel Utz Wirnsberger


Master of Urban Design (University of California, Berkeley)
Architecture Professional Degree (UdeC, Chile)

Ariel joined ratio: in April 2018 with over 6 years of professional work experience in strategic urban design, master planning, community design and landscape architecture projects in Chile and USA.

With qualifications in Architecture and Urban Design, and experience in the public and private sector, his interest has always focused on the relation between built and natural environments.

His work aims to generate high quality urban environments, bringing a cultural meaning to the urban landscape design.


8 Gwynne Street
VIC 3121


Suite 2, 12-14 Union Street


VIC 3220


154 Macleod St
VIC 3875

Get in touch

Phone: (03) 9429 3111
Fax: (03) 9429 3011

Ratio acknowledges the Wurundjeri people of the Kulin Nation, the traditional custodians of the land upon which it is based. We recognise their continuing connection to land, waters and culture.

ratio: consultants pty ltd