About Tammy Klein

Tammy Klein is the founder and CEO of Transport Energy Strategies. She provides market and policy intelligence with unique insight and analysis drawn from her global network in the fuels industry through the consulting services she provides and the membership-based The Outlook service. She is an expert on conventional, biofuels and alternative fuels market and policy issues. Tammy serves clients in the auto, oil and associated industries, as well as governments and NGOs and helps them understand current and future fuels trends and issues; or in the case of government and NGOs, the best policies to develop and implement.

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.

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 Projects, Studies and Reports:

  • Ready for Take Off: Sustainable Aviation Fuels, November 2020 [prepared for The Outlook Service members]
  • Hydrogen Production Pathways to Support Decarbonization, October 2020 [prepared for The Outlook Service members]
  • A Fuel Blending Guide for Ethanol: Identifying Sound Practices for Acquiring or Blending Fuels for Studies of Emissions Changes, June 2020 [co-author, prepared for the Urban Air Initiative]
  • Methanol: A Future-Proof Fuel, March 2020 [prepared for the Methanol Institute]
  • Separating Fact from Fiction: National ICEV Ban Policies, February 2020 [prepared for The Outlook Service members]
  • Tracking the Global State of Play in Fuels Issues, February 2020 [prepared for an oil company]
  • Pathways to 16 Billion Gallons, January 2020 [prepared for ethanol organization] (co-author)
  • The Future of EVs: A Base Case Projection to 2040 [prepared for an oil company]
  • Investigating Renewable Diesel Demand, June 2019 [prepared for an oil company]
  • National EV Policies around the World, June 2019 [prepared for The Outlook Service members]
  • Effects of Ethanol Blends on Light-Duty Vehicle Emissions: A Critical Review, January 2019 [co-author, prepared for the Urban Air Initiative]
  • Investigation of the China Fuel Market, September 2018 [prepared for an oil company]
  • The EV Scorecard — Assessing Current and Future Global Markets, June 2018 [prepared for The Outlook Service members]
  • A Review of Policy & Market Dynamics of the Renewable Diesel and Jet Fuel Market, May 2018 [prepared for an advanced biofuel producer]
  • Benchmarking All the EV Outlook Studies: What Do We Know?, November 2017
  • Assessing Current & Future Global Initiatives on Fuels & Vehicles, November 2017 [prepared for the Fuels Institute]
  • An Assessment of Competitors in the Renewable Diesel Market, June 2017 [prepared for an advanced biofuel producer]
  • Driving Renewable Energy for Transport: Next Generation Policy Instruments for Renewable Transport (RES-T-NEXT), November 2015 (co-author) [prepared for the International Energy Agency]
  • International Fuel Quality Standards and Their Implications for Australian Standards, November 2014 (co-author) [prepared for the Australian Department of Environment]
  • Consultancy for Development of a Fuel Quality and Biofuel Policy Framework For Zimbabwe, 2014 (project leader, co-author [prepared for the Zimbabwe Energy Regulatory Authority]
  • A Review of Trends in the California LCFS Program, January 2014
  • Fuel Efficiency Improvement Opportunities for Saudi Arabia, 2012 (project leader, co-author) [prepared for Saudi Aramco]
  • Dieselization Opportunities for Saudi Arabia, 2012 (project leader, co-author) [prepared for Saudi Aramco]
  • Land Use Change: Science and Policy Review, October 2010 (co-author, project co-leader) [funded by the Packard Foundation and Energy Foundation]
  • The Development of Bioenergy Standards, Policies and Implementation Plans in Singapore to 2050, February 2010 (project co-leader, co-author) [prepared for the Singapore Energy Management Authority]
  • Status of Next Generation Biofuels, April 2010 (co-author) [prepared for the Japan Petroleum Energy Center]
  • Technical and Policy Assistance for Biofuel Market Development in El Salvador, June 2009 (co-author) [prepared for the Organization of American States]
  • Fuel Quality Monitoring, Compliance & Enforcement Programs: An International Assessment, April 2003 (co-author) [prepared for the Australian Department of Environment & Heritage]


  • 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