The Board of Directors brings guidance, monitors performance and helps ensure the well-coordinated and efficient execution of our mission.

Board of Directors

The GBPN Board of Directors provides strategic and operational oversight of the GBPN Global Centre, and monitors its performance.

The Board is composed of 3 members:


William Sisson, Executive Director of World Business Council for Sustainable Development (WBCSD), North-America operations

Based in New-York city, William Sisson oversees WBCSD’s regional member relations and growth efforts, sustainability focused member projects and strategic events.   Prior to his role with WBCSD, Bill gained over 30 years of private sector experience with the multi-national conglomerate United Technologies Corporation (UTC), where he capped his career as Senior Executive Director for Sustainability.   While at UTC, his responsibilities included directing Carrier’s long-range HVAC research as well as managing Carrier’s Commercial Controls division.  

Bill presently sits on the Technical Review Committee of the Global Cooling Prize, administered by Rocky Mountain Institute, and is a member of the expert group for Aspen Global Change Institute’s research on Industry Decarbonization.  

After 6 years on the Global Buildings Performance Network (GBPN) Board, Bill was appointed the Chairman and Board President in September 2018.  He holds advanced degrees from Virginia Tech, Rensselaer Polytechnic Institute, and Massachusetts Institute of Technology Sloan School of Business, where he is a Sloan Fellow alumnus.  






Dr. Lee Siew Eang, Co-director of the Building Energy Efficiency Hub at the National University of Singapore (NUS)

Trained as a building scientist, Dr. Lee works in the areas of building energy performance and acoustics at the Department of Building, National University of Singapore (NUS). He is co-director of the Building Energy Efficiency Hub at NUS—a strategic initiative at the University aiming at reducing energy consumption on campus. The BEE Hub focuses on energy dashboard development, occupancy modelling, building systems’ efficiency and well and green in the built environment.

As consultant, Dr. Lee and his team have participated in projects such as the National Library Building, Khoo Teck Puat Hospital and the Zero Energy Building @ BCA Academy. They are all multiple awards winning project. Dr. Lee is active in the South East Asia region. He was the chair of the board of judges for ASEAN Energy Efficient Building Awards, and was awarded the ASEAN Ministers’ Meeting Award for Excellence in Energy Management.

Dr. Lee was appointed as Board Member and secretary of the Global Buildings Performance Network (GBPN) in May 2019.






Mili Majumdar, Managing Director of Green Business Certification Institute Pvt Ltd, India and Senior Vice President, USGBC

As Managing Director of Green Business Certification Institute Pvt Ltd, India and Senior Vice President, USGBC, Mili is responsible for technical adaptation and customization of the portfolio of rating systems of GBCI for the Asia Pacific region. An architecture graduate and a building technologies specialist, Mili has more than two decades of experience in the field of energy, green buildings, climate resilient housing, city planning, urban transportation and environment with a focus on sustainable development of habitats.

She is member of Committee for formulation of energy conservation building codes for India, Member of Committee of Bureau of Indian Standards for revision and updating of National Building Code of India. She is Advisor to Delhi Urban Arts Commission and Glass Academy of Saint Gobain.  She is Founder member of the Indian Building Performance Simulation Association. She was Member of Expert Appraisal Committee (Infra-2) constituted for appraisal of infrastructure projects by Ministry of Environment, Forest & Climate Change (Government of India).  She was Member of the Assurance Group of the World Business Council for Sustainable Development Energy Efficiency in Buildings Project.

Mili Majumdar was appointed as Board Member of the Global Buildings Performance Network (GBPN) in May 2019.