Board of Directors

Roger W. Crandall
Chairman, President, and Chief Executive Officer, Massachusetts Mutual Life Insurance Company, Springfield, Massachusetts
Board Committees: Executive (Chair), Investment, and Technology & Governance

Kathleen A. Corbet
Founder and Principal, Cross Ridge Capital, LLC, New Canaan, Connecticut Former President, Standard & Poor’s, New York, New York
Board Committees: Audit, Executive, and Investment (Chair)

James H. DeGraffenreidt, Jr.
Chairman and Chief Executive Officer, Retired, WGL Holdings, Inc., Washington, D.C.
Board Committees: Audit, Executive, and Human Resources (Chair)

Isabella D. Goren
Former Chief Financial Officer, American Airlines, Inc. and AMR Corporation, Fort Worth, Texas
Board Committees: Audit (Chair), Executive, and Investment

Bernard A. Harris, Jr., MD, MBA
CEO and Managing Partner, Vesalius Ventures, Inc., Houston, Texas
Board Committees: Audit and Investment

Michelle K. Lee
Founder and Chief Executive Officer, Obsidian Strategies, Inc., Saratoga, California Former Vice President, Machine Learning Solutions Lab & Computer Vision Amazon Web Services, Palo Alto, California
Board Committees: Human Resources and Technology & Governance

Jeffrey M. Leiden, MD, PhD
Lead Director, Massachusetts Mutual Life Insurance Company, Springfield, Massachusetts Executive Chairman, Former President and Chief Executive Officer, Vertex Pharmaceuticals Incorporated, Boston, Massachusetts
Board Committees: Executive, Human Resources, and Technology & Governance

Laura J. Sen
Former Non-Executive Chairman, and Former Chief Executive Officer BJ’s Wholesale Club, Inc., Westborough, Massachusetts
Board Committees: Executive, Human Resources, and Technology & Governance (Chair)

William T. Spitz
Principal and Co-Founder, Diversified Trust Company, Nashville, Tennessee Vice Chancellor for Investments Emeritus, Vanderbilt University, Nashville, Tennessee
Board Committees: Audit and Investment