Sean O'Sullivan

Managing General Partner at SOSV

Sean O’Sullivan’s first startup went public in 1994, he founded SOSV in 1995 as a “super angel.” In 2007, based on the success of two dozen investments that had done remarkably well, Sean began aggressively expanding SOSV and transitioning it from a personal investment vehicle into an organization that today has more than 120 staff supporting investments in over 150 new startups every year. In 2020, SOSV had eight general partners operating globally with major offices in Shanghai, Shenzhen, Taipei, San Francisco, New York, Cork, and Tokyo.

Sean got his entrepreneurial start in 1985 as a founder of MapInfo, bringing street mapping technology to personal computers. MapInfo went on to become a $200 million revenue public company with over 1,000 employees worldwide. In 1996, while at the helm of his second company, NetCentric, he created “software for inside the Internet” and is credited with co-creating the term “cloud computing” alongside George Favaloro from Compaq.

Sean continued as an entrepreneur and investor, creating and supporting a range of business, humanitarian, and educational endeavors. A major promoter of economic and social development, he founded JumpStart International in 2003. JumpStart was a leading humanitarian engineering organization based in Baghdad and operated throughout Iraq from the post-war period of 2003 to 2006. He spent a few years running JumpStart, which for a time had a staff of more than 3,000, running up to 80 projects at a time in Baghdad, Fallujah, and Najaf. As a benefactor of the O’Sullivan Foundation, Sean has also been a primary funder of organizations such as Khan Academy, Mathletes, and CoderDojo.

As the founding Chairman of the Irish Entrepreneurship Forum and founder of Open Ireland, he was a leader and influencer of Irish government policy in fueling economic growth and recovery in the technology sector. Sean was a regular investment panelist on the popular RTÉ TV show Dragon’s Den and an occasional columnist for Ireland’s Sunday Business Post.

Sean holds a Bachelor of Science in Electrical Engineering from Rensselaer Polytechnic Institute and a Master of Fine Arts in Film Production from the University of Southern California.



  • Managing General Partner

    Current role

View in org chart