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Tammy Klein is the founder and CEO of Transport Energy Strategies, a consultancy that provides market, policy and technology intelligence, research analysis and strategic advice consulting services to clients on a range of global transport energy issues. She runs a member-based consulting service, the Transport Energy Outlook, which provides research analysis on global trends for clients across a range of sectors, including refining, auto, engine, biofuels and alternative fuels. She created and hosts the Fueling the Future of Transport podcast.

Tammy’s focus is the intersection of climate change, the energy transition and what it means for the transport energy industries. She is actively advising companies on these issues, particularly as they relate to environment, social and governance (ESG) investments to combat climate change. For 25 years, Tammy has served as a strategic advisor and research analyst for clients in these industries and has advised governments and NGOs as well on transport energy issues, including fuel quality, vehicle emissions and fuel economy, biofuels and alternative fuels issues such as electricity and hydrogen, and novel low carbon fuels.

She is formerly Senior Vice President for Stratas Advisors/Hart Energy and in that capacity was responsible for overseeing all aspects of its fuels and transport-related research, products, services, staff and consultancy. Prior to that she was the Executive Director of the Global Biofuels Center, a service of Hart Energy she co-created, that tracks, monitors and analyzes biofuels market, policy and technology developments in more than 70 countries. She created, oversaw and was the lead author of the company’s annual outlook and forecast for biofuels supply and demand. Tammy also helped launch Hart’s International Fuel Quality Center (IFQC), a service covering global fuel quality issues, and served as a senior analyst for the Americas region covering market and policy issues for many years.

Tammy continues to serve as an advisor to many companies, governments and NGOs on transportation fuels issues. She has advised the Organization of Petroleum Exporting Countries (OPEC), International Petroleum Industry Environmental Conservation Association (IPIECA), Energy Management Authority (EMA) of Singapore and Natural Resources Defense Council (NRDC) and the International Energy Agency (IEA), among others. Prior to her time at Hart Energy, she was an associate at Venable LLP specializing in environmental and administrative law matters. She holds a J.D. from the Georgetown University Law Center and a B.S. from the University of Florida.

Assignment Highlights

  • Chair, Electric Vehicle Council, 2020-present
  • Board Member, Fuels Institute Board of Advisors, 2018-present
  • Board Member, NREL’s Biofuels Technical Review Panel, 2011-2014
  • Board Member, Western Governor’s Association Alternative Transportation Fuels for the Future Advisory Committee, 2007-2008
  • Advisor and Co-Author, Sugarcane-Based Ethanol: Energy for Sustainable Development, BNDES, CGEE, UN-ECLAC, November 2008
  • Steering Committee, Partnership for Cleaner Fuels and Vehicles, 2001-2003

Selected Speeches & Insights:

Selected Consulting Engagements:


  • Member, District of Columbia Bar (2004-present)
  • Associate Member, Virginia State Bar (2003-present)
  • Member, American Society of Testing & Materials (ASTM) (2005-present)



  • Georgetown University Law Center, J.D., 2003
  • University of Florida, B.S., Journalism, 1995