Founded by Gary Wertheimer in 2007, GIW is a multi-disciplinary team of passionate sustainable design professionals. We work closely with our clients in order to deliver streamlined solutions, approaching every project with the utmost professionalism, diligence and commitment in the delivery of ESD services.

ESD Services

What We Do

Comprehensive Planning
& Design

  • Sustainable Management Plans
  • Green Star Project Delivery
  • Water Sensitive Urban Design Reports
  • Conceptual Building Services Design
  • VCAT Submissions / Presentations
  • ESD Masterplanning

Existing Building Retrofitting

  • NABERS Assessments and BEEC
  • Building Energy & Water Audits
  • Building Improvement Plans

Modelling Services

  • Energy / Thermal Modelling
  • Ventilation / Air Quality (CFD)
  • Daylight Modelling
  • Life Cycle Assessments / Value Engineering
  • AFRC Assessments

Code Compliance

  • NCC Section (Part J) Compliance Reporting
  • NCC Section J Alternative Solution Reporting including JV3 Energy Modelling and Expert Judgment
  • Nationwide House Energy Rating NatHERS

Research Tasks

  • Emerging Renewable Energy Technologies
  • Hot Water Services
  • Insulation Systems
  • Glazing Systems
Working with you

Leadership Team

GIW Environmental Solutions - Gary Wertheimer (Profile)

Gary Wertheimer


B.App Sci (Construction Management).
MSc.Renewable Energy & Architecture. (UK)

Gary Wertheimer is an ESD consultant with broad experience in the areas of statutory planning ESD Reporting submissions, Regulatory compliance reporting and existing building retrofits. Gary has built up a wealth of knowledge, experience and industry rapport based on a proven track record of delivering ESD excellence.

Given his background in project and development management, Gary is acutely aware of the total development process. He has solid working knowledge of the Building Act, Regulations and NCC, and is well attuned to delivering consulting services to the highest professional standard. He leads a multi-disciplinary ESD consultancy passionate about delivering tangible expressions of ESD within the built environment.

GIW Environmental Solutions - Niraj Patel (Profile)

Niraj Patel

Technical Lead - ESD

B.Eng (Mechanical)
M.Eng. (Sustainable Energy)

Niraj Patel is an ESD Engineer with experience in services engineering on large scale commercial building projects. He is driven by a passion for energy efficiency and green building technologies. Niraj has developed an expertise in building simulation energy modelling including JV3, energy auditing, NABERS assessments and existing buildings retrofit design solutions.

Niraj offers a technical expertise in research, analysis and appropriate adoption of innovative engineering design solutions and system technologies. In particular, he has an aptitude for architectural integration of renewable energy technologies, energy efficient services, natural ventilation and solar control strategies. He has developed experience in a variety of property sectors including some of Melbourne’s most iconic buildings. He has had particular exposure to multi-unit residential and aged care developments. Additionally, many of projects that he has been involved with have required Green Star design or assessment. As part of his Masters program, Niraj completed a research project with the support of AIRAH on the effectiveness of co/tri-generation systems in commercial buildings.

GIW Environmental Solutions - Ines Buskermolen (Profile)

Ines Buskermolen


B.Sc (Science, Business and Innovation)
M.Sc (Sustainable development)

Ines Buskermolen is an ESD consultant with experience in sustainability consulting, renewable energy technologies, lifecycle assessments and innovation management. Ines brings to the team an expertise in state-of-the-art and future ESD technologies.

Ines has been involved in multiple successful town planning applications. She contributes to early stage design review, identifies inherent ESD opportunities that are both economically feasible and sustainable. During this process, she engages with all involved sub consultants to achieve a well-balanced and practical result. She has developed expertise in sustainable reporting and BESS assessments. Ines has contributed to the development of the BESS tool and continues to be involved to optimise the use and performance of the tool.


Our Affiliations