Board of Directors

As Executive Chairman and Founder of Definitive Healthcare, Jason drives a client-centric approach to the business strategy and oversees the overall vision of the organization.

Prior to founding Definitive Healthcare, Mr. Krantz founded and served as CEO of Infinata, a SaaS based provider of intelligence to the pharmaceutical industry under the brand BioPharm Insight, from 1999 to 2007 until the company was sold to Pearson Media Group. In addition, Mr. Krantz has co-founded and helped build several intelligence and analytics companies including Energy Acuity, a privately held provider of intelligence on the alternative energy market and Xtelligent Media, a privately held integrated marketing company focused on the healthcare industry. Mr. Krantz previously served on the board of directors of RainKing Solutions from 2015 until 2017. Mr. Krantz holds a B.S. in Finance and Computer Science from Boston College and an M.B.A. from Harvard Business School.

Chilukuri was named co-CEO of Medidata in 2021. Chilukuri is also the Founder & President of Acorn AI, Medidata’s Data Science business. Chilukuri brings more than 22 years of expertise in healthcare technology. Before joining Medidata, Chilukuri was a partner at McKinsey & Company, where he worked for 12 years advising biopharma, medical device, technology, private equity, and public sector clients around the world. Prior to that, he worked for GE Healthcare in software engineering, product development, and operations.  His perspectives have been widely disseminated, including conferences, media, and numerous publications on McKinsey Insights. 

Chilukuri holds a Master of Business Administration from the Kellogg School of Management at Northwestern University, a Master of Science from The Ohio State University, and a Bachelor of Technology (B. Tech) from the Indian Institute of Technology (BHU) in Varanasi, India.

Chris Egan has served as a member of the board of directors of the Company since July 2019.

Mr. Egan is a Managing Partner of Advent International, which he joined in 2000. Prior to Advent, Mr. Egan served as an analyst at UBS, a Swiss multinational investment bank and financial services company. Mr. Egan currently serves or has served on the board of directors of Ansira Holdings, NielsenIQ and Prisma Medios de Pagos S.A., each a private company. Additionally, Mr. Egan serves on the board of directors of CCC Intelligent Solutions Holdings Inc., a public company. Mr. Egan holds a B.A. in English and Economics from Dartmouth College.

Al Hamood has served as a member of the board of directors of the Company since September 2020.

Mr. Hamood currently serves as President and Chief Administrative and Finance Officer at Culligan International Co (“Culligan”), a world leader in delivering superior water solutions which he joined in August 2019. Prior to his time at Culligan, Mr. Hamood served as interim Chief Executive Officer and President of ATI, a nationally-recognized rehabilitation provider, from January 2018 to August 2019. Prior to his time at ATI, Mr. Hamood served as Executive Vice President and Chief Financial Officer of Change HealthCare Corporation from 2017 to 2018, and as Executive Vice President and Chief Financial Officer of TransUnion from 2008 to 2018. Mr. Hamood also previously served on the board of directors at Culligan from 2016 to 2019 and currently serves as a director of Accentcare, a privately held leader in post-acute home healthcare services. Mr. Hamood is a Certified Public Accountant (inactive status) and received his Bachelor of Business Administration in finance at The University of Iowa, and his Juris Doctor from Southwestern University School of Law.

Jeff Haywood has served as a member of the board of directors of the Company since February 2015.

Mr. Haywood is a Managing Director at Spectrum Equity, which he joined in February 2007. Prior to Spectrum, Mr. Haywood served as an associate at Thoma Cressey Equity Partners (since renamed Thoma Bravo LP), an American private equity and growth capital firm, and as an analyst at Goldman Sachs. Mr. Haywood also currently serves on the board of directors of the privately held RxVantage, Datassential, and Payer Compass. Mr. Haywood also currently serves as a Board Observer at Everlywell. Previously, Mr. Haywood has served on the board of directors of a range of private companies such as PWNHealth, Net Health, RainKing Software, Verisys and HealthMEDX. In addition, Mr. Haywood has previously served as Board Observer at MedHOK and Passport Health Communications. Mr. Haywood holds a B.A. in Political Science and History from Duke University.

Jill Larsen has served as a member of the board of directors of the Company since April 2021.

Ms. Larsen currently serves as the Chief People Officer of Synopsys, a public electronic design automation (EDA) company that focuses on silicon design and verification, silicon intellectual property and software security and quality. Previously, Ms. Larsen served as the Chief People Officer & Executive Vice President at PTC Inc., a global software company in the industrial and manufacturing space. Prior to her time at PTC, Ms. Larsen served as the Executive Vice President - Human Resources and Chief Human Resources Officer of Medidata Solutions, Inc., an American technology company that develops and markets software as a service for clinical trials from April 2018 to January 2020. Ms. Larsen has over 20 years of experience establishing and transforming human resources and talent strategies at global, high-tech companies and has also previously served as senior vice president of talent acquisition and human resources at Cisco Systems, Inc., a public technology conglomerate from April 2013 to April 2018. She also held executive HR leadership roles at Dell EMC, a company that sells products ranging from data storage to information security, and was chief human resources officer of RSA, the security division of Dell EMC. Ms. Larsen is PHR certified and received her B.A. in communications and English from Boston College, and her MBA in Human Resources Management from Emmanuel College.

Robert Musslewhite is the Chief Executive Officer of Definitive Healthcare and has served as a member of the board of directors of the Company since June 2021. Prior to joining Definitive Healthcare, Mr. Musslewhite was the Chief Executive Officer of OptumInsight, a division of Optum.  Mr. Musslewhite joined Optum following its acquisition of The Advisory Board Company, where he served as Chief Executive Officer from 2008 until 2017 and Chairman from 2013 to 2017. Prior to joining The Advisory Board Company, Mr. Musslewhite was an Associate Principal with McKinsey & Company, a global management consulting firm. 

Mr. Musslewhite currently serves on the Boards of Directors of CoStar Group (Nasdaq: CSGP) and Ascend Learning. He is a member of the Economics Club of Washington D.C., and he recently completed service as Chair of the Board of Governors of St. Albans School. 

Mr. Musslewhite received a J.D. from Harvard Law School and an A.B. in Economics from Princeton University. 

Outside of the office, Mr. Musslewhite is a long-suffering Dallas Cowboys fan and an avid outdoorsman who loves spending time with his kids hiking and skiing. 

Mr. Stephenson has served as a member of the Board of Directors of the Company since September 2023. Mr. Stephenson held various roles at Verisk Analytics, Inc., a publicly traded strategic data, analytics, and technology partner to the global insurance industry between 2001 and May 2022, including as a member of the Board of Directors from April 2013 to May 2022, Chairman of the Board from April 2016 to May 2022, Chief Executive Officer from April 2013 to May 2022, and President from March 2011 to May 2022. From 1989 to 1999, Mr. Stephenson was a Partner with The Boston Consulting Group, eventually rising to Senior Partner and member of the firm’s North American operating committee. Since February 2020, Mr. Stephenson has served on the Board of Directors of Public Service Enterprise Group Inc. (NYSE: PEG), the publicly traded parent company of New Jersey-based gas and electric utility company, Public Service Electric and Gas Co. (PSE&G). Mr. Stephenson is an Advisory Partner with Advent International and a Senior Advisor to the Boston Consulting Group. Mr. Stephenson holds a B.S. from the University of Virginia and an M.B.A. from Harvard Business School.

Kathleen A. Winters recently retired from her role as Chief Financial Officer of ADP (NASDAQ:ADP), a leading global technology company providing human capital management solutions. At ADP, Ms. Winters was responsible for leading the global finance organization and representing the company to investors, lenders and rating agencies and played a significant role in driving the company’s strategy, growth and operational effectiveness. In her role as CFO, Ms. Winters oversaw Business Finance, Financial Planning and Analysis, Investor Relations, Tax, Treasury, Controllership and Audit. 

Prior to joining ADP, Ms. Winters served as Managing Director, Chief Financial Officer of MSCI Inc. (NYSE:MSCI), a leading provider of investment decision support tools including indexes, for institutional investors for three years. Before joining MSCI, Ms. Winters previously spent 14 years in various leadership roles at Honeywell International, including CFO of Performance Materials & Technologies, a $10 B materials and services company, Corporate Controller and Global Leader of Financial Planning & Analysis. Prior to Honeywell, Ms. Winters began her career at PwC, serving clients primarily in the entertainment and media industries. 

Ms. Winters has a demonstrated track record of strategic decision making, operational execution, building and leading high performing teams, designing and implementing change and driving financial results. She has extensive global operating experience across a variety of industries and business models. She received her bachelor's degree from Boston College and is a CPA and a Six Sigma Certified Black Belt.

Lauren Young has served as a member of the board of directors of the Company since July 2019.

Ms. Young is a Managing Director of Advent International, a private equity firm that focuses on investments in five core sectors: business and financial services; healthcare; industrial; retail, consumer and leisure; and technology. Ms. Young joined the firm in 2011. Prior to Advent, Ms. Young was a member of the US buyout fund at The Carlyle Group, an American multinational private equity, alternative asset management and financial services corporation, from 2006 to 2009 and served as an analyst at McColl partners from 2004 to 2006. Ms. Young also currently serves on the board of directors of Forescout Technologies and P2 Energy Solutions. Additionally, Ms. Young serves on the board of directors of CCC Intelligent Solutions Holdings Inc., a public company. Ms. Young holds a B.A. from Davidson College and an M.B.A. from the Harvard Business School.