OvaScience is a global life sciences company dedicated to improving fertility for women around the world.


Leadership Team

Executive Chairman, Chief Executive Officer and Co-founder

Dr. Dipp is the Executive Chairman and founding Chief Executive Officer of OvaScience. Dr. Dipp is also a Founder and Partner of Longwood Fund, a healthcare investment fund. Previously, Dr. Dipp was the Senior Vice President and Head of the CEEDD at GlaxoSmithKline. Prior, she was Vice President of Corporate Development at Sirtris prior to its acquisition by GSK. Before joining Sirtris, Dr. Dipp worked in healthcare private equity at The Wellcome Trust, London. Dr. Dipp serves on the Biotechnology Industry Organization’s (BIO) Emerging Companies Governing Board, the New England Venture Capital Association (NEVCA) Board, the Beth Israel Deaconess Medical Center Board of Directors, the Boston Symphony Orchestra Board of Overseers, and the MassBio Advisory Board. In March 2015, Dr. Dipp was elected to join the World Economic Forum’s Young Global Leaders (YGL). In September 2015, Dr. Dipp was named to Fortune magazine’s 40 Under 40 list.

Dr. Dipp holds an M.D. and a Ph.D. from the University of Oxford.


Dr. Tzianabos is President and Chief Scientific Officer of OvaScience. Prior to this role, Dr. Tzianabos was Chief Scientific Officer at the Company. Dr. Tzianabos brings to OvaScience more than 20 years of experience in drug discovery and development, strategic planning, portfolio management, business development and alliance management. He joined OvaScience from Shire, where he served as Senior Vice President and Head, Research and Early Development. During his eight years at Shire, he served in roles of increasing responsibility and was instrumental in the development of the human genetic therapies pipeline following Shire’s acquisition of Transkaryotic Therapies, Inc. in 2005. He also played an active role in the development, approval, and commercial launch of several therapies for the treatment of patients with rare diseases. Prior to Shire, Dr. Tzianabos was an Associate Professor of Medicine at Harvard Medical School and maintained laboratories at the Channing Laboratory, Brigham and Women’s Hospital and the Department of Microbiology and Molecular Genetics at Harvard Medical School. A major focus of his research was on the development of therapies for the prevention of adhesion formation, a major cause of female infertility. During his time at Harvard, Dr. Tzianabos served as a consultant to several biotechnology companies, including Genzyme Corporation and Eli Lilly. Dr. Tzianabos has published more than 80 scientific papers, reviews, book chapters, and patents. He continues to advise and serve on the Boards of several biotechnology companies.

Dr. Tzianabos holds a B.S. in Biology from Boston College and a Ph.D. in Microbiology from the University of New Hampshire.

EVP, Global Site Operations

Mr. John Eisel is the Executive Vice President of Global Site Operations. He joined from InnerWorkings LLC, where he served as Chief Operating Officer since 2011. Prior to that, he was Divisional Vice President of Strategic Operations, Pharmacy Services for Walgreens, where he designed and led operations strategy for the more than $40 billion pharmacy business. He also held roles of increasing responsibility at McKinsey & Company, including serving as Associate Principal. Mr. Eisel began his career at PricewaterhouseCoopers, serving as a Senior Associate in Financial Advisory Services.

Mr. Eisel is a Certified Public Accountant and holds a B.S. in Accountancy from the University of Illinois at Urbana-Champaign and an M.B.A. from Northwestern’s Kellogg School of Business.

Chief Corporate Development Officer

Dr. Mehrotra is the Chief Corporate Development Officer at OvaScience. He joined from Credit Suisse LLC where he served as Global Head of Biotechnology Equity Research since 2010 based in New York, leading the equity research team that covered more than 40 global biotechnology and life sciences companies. Dr. Mehrotra originally joined Credit Suisse in 2004 in London, U.K., and served as Head of European Biotechnology and EMEA Equity Research, being ranked the number one analyst in both European Institutional Investor and Extel surveys. Prior to that, he held positions of increasing responsibility at SG Cowen in London, including Head of European Biotechnology. Earlier in his career, he worked for Deutsche Bank (Natwest Markets/BT Alex Brown) in London.

Dr. Mehrotra holds a Bachelor of Science in Biochemistry and a Ph.D. in Biochemistry and Molecular Biology from Manchester University.

Chief Financial Officer

Mr. Jeffrey Young is the Chief Financial Officer at OvaScience. Mr. Young joined OvaScience from Transmedics, Inc., where he served as Chief Financial Officer and Treasurer, leading the finance, accounting, tax and treasury functions. Prior to Transmedics, Mr. Young was CFO and Treasurer at Lantheus Medical Imaging, Inc. While at Lantheus, an international corporation, he was responsible for multiple functions, including finance, accounting, customer service, tax and treasury. He also assisted in raising $400 million in a registered notes offering. Before Lantheus, Mr. Young served as Chief Accounting Officer, Vice President of Finance and Treasurer at Critical Therapeutics, and managed the company’s transition during its acquisition by Cornerstone BioPharma. Earlier in his career, Mr. Young held finance roles at PerkinElmer, Inc. and PricewaterhouseCoopers.

Mr. Young is a Certified Public Accountant and holds a B.S. in Business Administration from Georgetown University.