Mark Jacobsen has advised companies and entrepreneurs for over 25 years and is currently retired. Mark was a co-founder of O’Reilly AlphaTech Ventures in 2005, raised three seed stage venture funds and served as Managing Director until 2025. He has served on numerous nonprofit boards. Mark currently lives in San Francisco.
Mark joined O’Reilly Media in 1995 and, as Executive VP for New Ventures and Business Development, managed its investment portfolio for nine years. Prior to joining O’Reilly Media, Mark was the Business Affairs Director at Colossal Pictures, an animation studio in San Francisco. Mark was also a partner at Mandel, Buder & Jacobsen, representing many small and medium size companies, and an associate at Brobeck, Phleger & Harrison. Mark holds a J.D. from Georgetown University Law Center and a B.A. from St. Olaf College.
