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Mary Ann Piette

building and grid efficiency expert: Energy Technologies Area

Media contact: Julie Chao,, (510) 486-6491

Allan Chen,, (510) 486-4210


Mary Ann Piette is deputy director of Berkeley Lab's building technology department and director of the Lab's Demand Response Research Center. She develops and evaluates low-energy and demand response technologies for buildings. She specializes in commissioning, energy information systems, benchmarking and diagnostics.

Piette has been at Berkeley Lab since 1983 and has extensive experience evaluating the performance of energy efficiency and demand response in large facilities. She has written more than 100 papers on efficiency and demand response.

Awards and Memberships

  • Peak Load Management Association - Innovative Application of Commercial and Industrial Technology Award for Automated Demand Response, 2007.

  • Buildy Award, Connectivity Week – 2008 – Winner for Application of Automated Control Technology, Automated Demand Response.

  • Flex Your Power Honorable Mention – Automated Demand Response 2008, Contra Costa County 13 Buildings with average reduction of 20%.

  • Benner Award, May 2006 National Conference on Building Commissioning for outstanding achievement in making building commissioning "business as usual.”

  • GSA award, 2002 Federal Energy and Water Management Award, Oct. 23, 2002, Innovative/New Technology Awards to Small Groups for General Services Administration Energy and Maintenance Network, for exceptional accomplishments in the efficiency use of energy in the Federal Sector.

  • Association of Energy Engineers: Energy Technology Promoter of the Year, Nov. 2002.

In the News

Piette was named one of the top 25 movers and shakers in cleantech for 2010 in a list published by consulting firm RoseRyan.''

"OpenADR's Steps Toward a National Smart Grid Standard," Berkeley Lab News Center, May 28, 2010


Piette has a B.A. in Physical Science and an M.S. in Mechanical Engineering, both from UC Berkeley. She also has a Licentiate in Building Services Engineering.


Piette defines "demand response."


Piette speaks at Science at the Theater about "The House of the Future" (second speaker).

last updated: 2017-08-04 08:44:56