Summit Partners Expands Team With New Hires

Global growth equity firm Summit Partners said Monday that it has beefed up its senior healthcare investment team. The firm has named Darren Black as managing director for its Boston office and Thomas Tarnowski as a principal in the firm’s London office. Previously, Black was a managing partner with SV Life Sciences while Tarnowski led Triton’s Nordic healthcare team.


BOSTON, MA, AND LONDON, UK – September 9, 2013 – Summit Partners, a global growth equity investor, today announced the appointments of two senior healthcare investment professionals: Darren Black, Managing Director in Summit’s Boston office, and Thomas Tarnowski, Principal in Summit’s London office. Since 1984, Summit has invested in more than 70 companies across the healthcare and life sciences industry.
“We’re delighted to welcome Darren and Thomas to our experienced team,” said Marty Mannion, a Managing Director in Summit’s Boston office. “Their deep knowledge and sector expertise will help Summit build on its nearly 30-year history of investing in the healthcare sector. We’re very much looking forward to working with them.”
Scott Collins, a Managing Director in Summit Partners’ London office, added, “Darren and Thomas bring strong industry experience and business acumen to Summit Partners. This will greatly benefit both the firm and our portfolio companies, and help us remain the growth equity partner of choice for industry-leading companies.”
Darren Black brings more than 20 years of healthcare investment and entrepreneurial experience. Prior to joining Summit, Mr. Black was a Managing Partner with SV Life Sciences where he focused on investing in healthcare services, healthcare information technology and pharmaceutical services. During his 10 years with SV Life Sciences, he sat on numerous boards including Vitalize Consulting Solutions, Celerion and Spectrum Professional Services. Before SV Life Sciences, Mr. Black was Cofounder and President of two specialty contract research service businesses: ClinCare and PharmaStar. Prior to that, he was a healthcare consultant for Accenture. Mr. Black earned an MBA from the Wharton School of the University of Pennsylvania and an AB in Government from Harvard College. He currently serves on the board of Health Forum within the American Hospital Association.
Thomas Tarnowski is a Danish national with more than 12 years of investing and healthcare experience in the United States, United Kingdom, and Central and Northern Europe. Mr. Tarnowski will lead Summit’s healthcare and life sciences team in Europe. Prior to joining Summit, he led Triton’s Nordic healthcare team focusing mainly on healthcare services and medical technology investments. During his seven years with Triton, Mr. Tarnowski served on several boards including one of the largest healthcare services companies in the Nordic region. Before Triton, he worked for Credit Suisse First Boston in the Financial Sponsors Group covering North America. Prior to that, he worked for Citigroup. Mr. Tarnowski earned an MBA from Harvard Business School and a BBA in Finance from Valdosta State University. He speaks Danish, English, Norwegian, Polish and Swedish.
About Summit Partners
Founded in 1984, Summit Partners is a growth equity firm that has raised nearly $15 billion in capital, and provides equity and credit for growth, recapitalizations, and management buyouts. Summit has invested in more than 380 companies in technology, healthcare and other growth sectors. These companies have completed more than 130 public offerings, and more than 135 have been acquired through strategic mergers and sales. Notable investments in the healthcare and life sciences sector include: American Dental Partners, AmeriPath, Anesthetix, COMS Interactive, Diagnostic Hybrids, HealthCare Partners, Heart to Heart Hospice, MDVIP, Lincare, Pediatrix Medical Group and Solutionreach. Summit maintains offices in North America, Europe and Asia and invests in companies around the world. For more information, please visit or
In the United States of America, Summit Partners operates as an SEC-registered investment advisor. In the United Kingdom, this document is issued by Summit Partners Limited, a firm authorized and regulated by the Financial Conduct Authority. Summit Partners Limited is a limited company registered in England and Wales with company number 4141197, and its registered office is at 20–22 Bedford Row, London, WC1R 4JS, UK. This document is intended solely to provide information regarding Summit Partners’ potential financing capabilities for prospective portfolio companies.