Mark J. Guinan

Executive Vice President & Chief Financial Officer at Quest Diagnostics, Inc.

Relationship Science aggregates deep and verified information on over 8 million influential decision makers and the over 1.7 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
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