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Ernst Theodor Sack
Partner, Blue Bear Capital
Ernst Theodor Sack is a founding partner at Blue Bear Capital, LLC, a venture capital firm focused on investing in machine intelligence and digital technologies for the global energy, infrastructure, and climate industries.36 With over 20 years of investment experience, Sack has a background in energy private equity, solar project finance, and venture capital.4
Career Highlights
- Blue Bear Capital: Partner since December 2016, leading investments in AI-enabled solutions for energy and climate tech.6
- Riverstone Holdings: Spent nine years at this leading energy private equity firm with over $35 billion in assets under management.36
- Citigroup M&A: Worked as an analyst covering conventional and renewable energy, shipping, and logistics industries.6
Investment Focus
Sack specializes in investing in companies that apply AI and software solutions to energy infrastructure, transportation, logistics, and energy-intensive industries.1 He has participated on the boards of directors of over 20 energy and software companies, including Raptor Maps, Shoreline, GoExpedi, and Element Analytics.56
Education
- B.S. in Science, Technology & International Affairs from Georgetown University3
- MBA from Columbia Business School and London Business School through a joint degree program36
Notable Achievements
- Led Blue Bear Capital's third fund closure at $160 million, with an additional $40 million in co-investment vehicles.12
- Instrumental in investments in companies like Raptor Maps (solar management platform) and TruckLabs (trucking efficiency technology).1
Ernst Sack's expertise in both energy infrastructure and AI technology positions him as a key figure in the intersection of climate tech and venture capital investment.
