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Senior Leadership

Romilly Madew
Chief Executive Officer

Romilly Madew is passionate about creating sustainable buildings, communities and cities. Since 2006, Romilly has led the Green Building Council of Australia, and has a global reputation as an influential advocate and change agent.

Romilly’s collaborative style has led to many board and committee appointments. She is Deputy President of the Australian Sustainable Built Environment Council, and the Independent Chair of the Currawong State Park Advisory Board (NSW). Romilly has previously been a member of numerous federal government ministerial panels including the Emissions Reduction Fund, the National Sustainability Council, National Urban Policy Forum and the China/Australia Services Sector Forum representing Construction.

Romilly is a board and executive committee member of the World Green Building Council, which is mobilising the global efforts of 100 green building councils; she was instrumental in establishing the New Zealand, South African, Hong Kong and Indonesian GBCs, as well as the Asia Pacific Green Building Network.

An experienced and charismatic keynote speaker and media commentator, Romilly shares her insights in dozens of publications each year, and was the author of the seminal Dollars and Sense of Green Building (2006), the first report to outline the business case for green building in Australia.

A member of Chief Executive Women and a finalist in the 2014 Instyle Magazine Women of Style awards – Environment, named one of the ‘100 Women of Influence 2012’ by the Australian Financial Review and Westpac, and was the National and NSW winner of the Telstra Business Women’s Awards 2009 (Community & Government).

A mother of three children, a long-distance runner and keen ocean swimmer, Romilly is President and Nipper Age Manager at the Bilgola Beach Surf Life Saving Club.

Lynne Harman
Executive Director – Legal Counsel & Company Secretary

Lynne joined the GBCA in June 2008 to provide support in the governance of the organisation and to coordinate and provide advice on legal issues. Her role includes taking responsibility for the conduct of board meetings and ensuring compliance with the GBCA Constitution and statutory requirements.

Lynne is the point of contact for all legal and governance issues that arise across the organisation. Lynne has a BA LLM from the University of Sydney and worked at the commercial law firm, Allens for 20 years. She is also a Graduate of the Australian Institute of Company Directors.

Jorge Chapa
Executive Director – Market Transformation

As the Executive Director of Market Transformation, Jorge is responsible for ensuring the GBCA's product and service offerings deliver more sustainable places for everyone.

Chief among his accomplishments is the latest version of Green Star, Australia's leading sustainability rating tool for buildings, fitouts and communities. This evolution of Green Star addresses issues such as climate change and adaptation plans, life cycle assessment of products and materials, healthy and active living programs for occupants, social return on investment, economic resilience, and the introduction of Green Star Innovation Challenges. In addition, Jorge is responsible for introducing additional products and services relevant to continue improving Australia’s new and existing building stock. 

Jorge has an architecture degree from the University of Monterrey in Mexico and a Masters in Design Science from the University of Sydney. He brings to his role a wealth of experience from his roles as an ESD consultant and product assessor with EcoSpecifier and architect with the Buchan Group.

Stephen Thatcher
Executive Director – Finance & Operations

Stephen's primary role at the GBCA is overseeing the financial management and general operations of the organisation, such as preparing the annual budget through to completion of the organisation's annual financial report.

Stephen has completed a Bachelor of Business (Accounting). He has worked in the corporate finance field for more than a decade, initially in the financial services industry before moving into the property sector. Prior to joining the GBCA, Stephen spent eight years with one of Australia's leading project management firms. 

He's also a passionate Manly Sea Eagles fan.

Margaret Khursigara
Executive Director – Commercial Business

Margaret joined the GBCA in January 2013 as Director of Marketing and before being appointed Executive Director – Commercial Business in September 2013. Margaret brings to her role more than 20 years' marketing and management experience, having worked with various banking, telecommunications, entertainment and retail clients in Australia and India.

Previously, as joint country manager for Pinpoint India, Margaret was based in Mumbai and established the Indian division over a three year period, overseeing marketing, IT, operations and finance functions. Margaret holds a Bachelor of Commerce, Marketing and Management from the University of Western Sydney.

Jeff Oatman
Director – Industry Experience & Skills

Jeff joined the GBCA in 2010, and is responsible for overseeing the management of the Green Star certification process. Originally from Canada, Jeff has come to Sydney via South Korea, where he worked in commercial leasing for a global real estate consulting firm. Jeff has a Master's Degree in Sustainable Development from the University of New South Wales.

Robert Milagre
Director – Sustainability Services & Reporting

Robert is responsible for the development and maintenance of Green Star rating tools including the new Green Star rating tool for sustainable building operations known as
Green Star – Performance.

A sustainability professional with more than 14 years' experience in consulting, project management and client relationship management, Robert has worked across both the public and private sectors.

He holds a degree in architectural engineering, as well as Masters degrees in sustainable development and business administration (MBA).

Trudy-Ann King
Director – Market Development

Trudy-Ann has been actively involved with the GBCA since its inception, and regularly presents both nationally and internationally at forums and conferences on sustainable design.

Previously a practice director with BVN Architecture, Trudy-Ann has 15 years' experience in commercial design, specialising in green workplace design.

In her current role, Trudy-Ann engages with industry to identify opportunities to drive the Australian property industry's transformation into one that is sustainable, liveable and resilient.

Helen Bell
Director – Research

Helen has over 13 years’ experience working in research and strategy development. In her current role at the Green Building Council of Australia, she combines her research experience with her passion for working towards a sustainable environment.

Helen has experience working for major media organisations, as well as a strategic planner for a federal government organisation and as a social research consultant. 

Helen holds a Communications degree, majoring in Marketing from the University of Canberra and a Post Graduate Diploma in Environment from the University of Melbourne. She is a Qualified Practicing Market Researcher (QPMR) and also a Green Star Accredited Professional – Design & As Built.


Emily Lawton
Director – Human Resources

Emily has been in HR management roles for more than 13 years. Before joining us she had worked exclusively in the legal industry including with Mallesons, Linklaters and the Australian Government Solicitor.

Emily's role as Human Resources Director is to help establish and implement HR strategies (in consultation with the GBCA Executive) which optimise employee performance and development opportunities which assist GBCA to meet its strategic objectives.

Emily has an honours degree in history from the Australian National University.


Katy Dean
Director – Advocacy

Katy joined the GBCA in August 2010 with experience working on policy development for the Australian Government, most notably with the Department of Agriculture, Fisheries and Forestry.

Katy is responsible for communicating the GBCA's green building policy priorities to the Federal Government and developing policy to drive the adoption of green building practices in areas such as education and healthcare.

Katy holds a Bachelor of Recreation Management from Lincoln University, New Zealand.