About
John is a Director of ACT Venture Capital and has been active in operating roles and venture investing for 20 years. John is currently on the boards of Adeptra, S3 Group, Frontier Silicon & Novate Medical and works with the teams at Swrve, Digit Gaming, Biosensia, Worldnet, Storyful and Cloudium. Previously, he was on the board of Kymata (acquired by Alcatel), AGI Therapeutics plc (acquired by Vidara Therapeutics), Firecomms (acquired by ZJF Group) and Intense Photonics and was involved with a number of other ACT investments. Prior to joining ACT, John worked with a range of start-up companies through the state indigenous development agency, Enterprise Ireland. Prior to that he held a number of business and operating roles with Misys plc, Kindle Banking Systems and KAO Info-systems. He graduated from University College Cork (UCC) with a degree in Commerce and also holds an ACCA Certified Diploma in Financial Management. John is an Adjunct Fellow at the UCC Business School.
Position in the VCSift Database
- • 9 investors at Act Venture Capital are tracked.
- • 626 investors hold the General Partner role in VCSift. John O'Sullivan is one of them.
- • 189 investors are based in Ireland.
Data sourced from 410,343 investor profiles. Updated July 2026.
Investment Focus
- Location
- Ireland
Contact Information
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