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Mark W. Callahan

Chief Actuarial Officer & Executive Vice President at HCC Insurance Holdings, Inc.
Relationship Science aggregates deep and verified information on over 6 million influential decision makers and the over 1.5 million organizations with which they are associated. From this data, we create a "business social graph" that highlights who knows whom. Here are Mark W. Callahan's strongest connections.

People Most Closely Connected to Mark W. Callahan

Click the names below to expand relationship details.
Christopher Williams
Chief Executive Officer at HCC Insurance Holdings, Inc.
William N. Burke
President & Chief Operating Officer at HCC Insurance Holdings, Inc.
Laurence C. D. Donnelly
President & Chief Executive Officer, HCC Indemnity Guaranty at HCC Insurance Holdings, Inc.
Kunihiko Fujii
Director, Chief Risk Officer & Executive Vice President at Tokio Marine Holdings Inc.
Randy D. Rinicella
Senior Vice President, General Counsel & Secretary at HCC Insurance Holdings, Inc.
Pamela J. Penny
Executive Vice President & Chief Accounting Officer at HCC Insurance Holdings, Inc.
Simon Button
Chief Underwriting Officer, International Operations at HCC Insurance Holdings, Inc.
Alexander M. Ludlow
Associate General Counsel & Assistant Secretary at HCC Insurance Holdings, Inc.
Richard E. Ruffee
Senior Vice President-Claims & Chief Counsel, HCC Global Financial Products (US) at HCC Insurance Holdings, Inc.
Katherine L. Letsinger
Interim Chief Financial Officer at Canopius US Holdings, Inc.
Daniel Adrian Strusz
President & Chief Executive Officer at HCC Life Insurance Co.
Barry J. Cook
Chief Executive Officer, HCC Insurance Holdings (International) Limited at HCC Insurance Holdings, Inc.
Tony O'Connor
Head of Treaty Reinsurance, International Operations at HCC Insurance Holdings, Inc.
Martyn Ward
Head of Credit & Surety Underwriting at HCC Insurance Holdings, Inc.
Brad Breau
Senior Vice President & Chief Information Officer at HCC Insurance Holdings, Inc.
John E. Robison
Vice President & Head of Investments at HCC Insurance Holdings, Inc.
Scott Anschultz
Owner at HCC Insurance Holdings, Inc.
Elaine L. Lawson
Vice President & Assistant General Counsel at HCC Insurance Holdings, Inc.
There are 99 more people accessible only with RelSci Professional.