Mark Liffmann is Vice President of Sales, Marketing and Business Development at Clean Power Research. Mark’s career includes co-founding one of the largest business units at SunPower where he led growth to over $500 million in annual revenue, and pioneered the successful expansion of the business unit to the European Union. While at SunPower, Mark also led the integration of the small commercial team after merging with PowerLight, and he helped form partnerships with numerous Fortune 500 companies. Previously at Solar Depot, Mark was responsible for doubling revenue and headcount in two years while serving as Vice President of Business Development and COO, and he established the groundwork for a successful sale of the business to Itochu. Mark’s experience also includes leading sales and business development efforts at EnerG2, a Seattle based energy materials startup, and serving at the law firm of Gunderson Dettmer, which specializes in financing emerging growth companies. Mark holds a B.S. in Physics and a B.A. in Public Policy from Stanford University, and a J.D. and an M.S. in Economics from Harvard University. Mark has been a member of E2 since 2002 and co-founded the Pacific Northwest chapter of E2 in 2009. Mark is married to fellow E2 member, Brooke Coleman, and is a father of two.

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STATEMENT: Federal Rollback of Auto Fuel Efficiency Standards Will Increase Costs for Consumers, Businesses

The National Highway Traffic Safety Administration (NHTSA) is expected to announce the Administration’s intent to weaken federal Corporate Average Fuel Economy (CAFE) standards for vehicles. Such a dramatic shift in policy would halt five decades of progres...


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Companies Cancel $4.4 Billion in Clean Energy Projects; $28 Billion, 30K Jobs Lost in 2025

WASHINGTON –Businesses canceled, closed, and scaled back more than $4.4 billion worth of large-scale factories and clean energy projects from late-September through October, bringing the total cost of projects cancelled in the private-sector to over $28.7 b...


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REPORT: Clean energy grew 5X faster than rest of Pennsylvania economy, added 3K jobs in 2024

HARRISBURG (Nov. 20, 2025) – Clean energy jobs in Pennsylvania grew more than five times faster than the rest of the state's economy in 2024, raising the total number of clean energy workers in the state to over 104,000, according to the Clean Jobs Pennsylv...


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