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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Our Latest Press Releases


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E2: Clean Energy Companies Announce Nearly $3 Billion in New Projects, Cancel $4 Billion

lean energy related companies announced 14 new manufacturing and utility-scale generation and storage projects totaling nearly $3 billion that would create 7,500 new jobs and add nearly 1 gigawatt (GW) in new capacity, according to E2’s latest Clean Economy...


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Clean Energy Developers Announced 12 GW, $18B in Q1 Generation Investments Before Tax Credit Cliff — But Project Losses Are Mounting

Clean energy developers announced more than 50 new utility-scale generation and storage projects totaling over 12 gigawatts (GW) and $18 billion in investment during the first quarter of 2026, according to E2’s latest Clean Economy Works analysis tracking c...


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House Republicans Launch Push to Reinstate Clean Energy Tax Credits

“Amid soaring electricity costs and tens of billions in clean energy projects getting cancelled and delayed across the country, this is a modest – but smart – step back in the right direction."


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