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Mark J. Guinan

Executive Vice President & Chief Financial Officer at Quest Diagnostics, Inc.
Relationship Science aggregates deep and verified information on over 6 million influential decision makers and the 2 million organizations with which they are associated. From this data, we create a "business social graph" that highlights who knows whom. Here are Mark J. Guinan's strongest connections.

People Most Closely Connected to Mark J. Guinan

Click the names below to expand relationship details.
Stephen H. Rusckowski
Chairman of the Board, President & Chief Executive Officer at Quest Diagnostics, Inc.
Surya N. Mohapatra
President at Quest Diagnostics Clinical Laboratories, Inc.
Alister W. Reynolds
Chief Executive Officer at SomaLogic, Inc.
David A. Rapperport
Executive Director of Software Engineering & Design at Quest Diagnostics, Inc.
Shawn Bevec
Executive Director Investor Relations at Quest Diagnostics, Inc.
Jon Roger Cohen
President & Director at AmeriPath, Inc.
Michael E. Prevoznik
General Counsel at Quest Diagnostics, Inc.
William J. O’Shaughnessy, Jr.
Secretary & Deputy General Counsel at Quest Diagnostics, Inc.
Robert A. Klug
Vice President, Controller & Chief Accounting Officer at Quest Diagnostics, Inc.
Jay G. Wohlgemuth
Chief Medical Officer, Senior Vice President-Research & Development at Quest Diagnostics, Inc.
Jeffrey S. Shuman
Senior Vice President & Chief Human Resources Officer at Quest Diagnostics, Inc.
Lidia Fonseca
Senior Vice President & Chief Information Officer at Quest Diagnostics, Inc.
John B. Haydon
Vice President, Global Markets & Chairman, Q2 Solutions at Quest Diagnostics, Inc.
Wendy H. Bost
Head-Media Relations at Quest Diagnostics, Inc.
Barbara Feringa
Executive Director at Quest Diagnostics, Inc.
Vanessa Abate
Executive Director Business Development at Quest Diagnostics, Inc.
Jon L. Hart
Chief Executive Officer at Med Fusion
Richard G. Keller
Vice President, Internal Audit at Hill-Rom Company, Inc.
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