our team
Michael O’Sullivan

Managing Partner

+44 (0)-1344-873-077


Michael O’Sullivan joined Plexus Ventures in September 1999 to head the Company’s new offices in London. In addition to his well-honed business development skills, Michael is particularly expert in finance.

Prior to joining Plexus Ventures, Mr. O’Sullivan served as Chief Financial Officer of Ethical Holdings plc for four years, where in addition to the financial affairs of the company, his responsibilities included corporate and business development activities. Previously, Mr. O’Sullivan spent 21 years at SmithKline Beecham where his duties included Vice President of Finance – Europe for Consumer Products; Vice President, Strategic Planning for Worldwide Pharmaceuticals; and Controller, Southern Europe Pharmaceuticals. For a number of years, Mr. O’Sullivan was responsible for SB’s pricing and transfer pricing policies. Mr. O’Sullivan is a member of the Chartered Institute of Management Accountants.

Michael O’Sullivan’s knowledge of finance and economic affairs from within a multinational pharmaceutical company coupled with his more recent experience of funding an early stage company insures that he is well positioned to advise clients on the optimal structure of collaborative agreements.