Bob Spinner

Managing Director

Bob joined Sigma in 2003 as Venture Partner and in 2006 became Managing Director. He brings to the firm two decades of high-technology business operational experience. Throughout his career, Bob has served in various operational capacities, including CEO, worldwide sales leader, technical sales support, software programming, database design, and private and public fundraising.

Bob’s operational and venture experience has allowed him to engage with companies at all stages of development. He has served as an active board member and advisor in all of his investments working with management teams to prepare for scale and efficient go-to-market models. Bob’s focus has been on applications and infrastructure with a particular focus in Security, Cloud and SaaS computing.


Prior to joining Sigma, Bob worked at three startup companies all of which went public. Bob was President and CEO of Extensity. During his tenure, Extensity grew from $1 million to $25 million while raising money through private funding and an Initial Public Offering. In March of 2003, Extensity was sold to GEAC. Prior to Extensity, Bob was Senior Vice President of Worldwide Sales and International Operations at Clarify, a leading provider of integrated CRM solutions. During his tenure at Clarify, the company grew from $5 million to $140 million in revenue while managing a worldwide organization of 260 professionals. Prior to Clarify, Bob served in expanding roles at Sybase including working as the director of one of Sybase’s most successful regions. Bob has also held technical roles at ADR and Chevron, including sales engineer, programmer and database administrator.


Bob received his Bachelor of Arts degree in Mathematics from Washington University in St. Louis, MO.



Admin Contact Info

Denise Soucie


  • Acquired by HP
  • Acquired by CA