Penner is a busy guy:
NB : Information is not dated!
-Board of Directors, Wal-Mart Stores, Inc., 2008 – present. Sits on Global Compensation Committee
-Board of Directors, Hyatt Hotels Corporation, August 2007 – present. Sits on Finance Committee. Madrone and its affiliates own 6.2% of Hyatt’s common stock and 8.2% of total shareholder voting power.
-Board of Directors, Cuil, Inc., 2008? – 2010?
-Board of Directors, The Seiyu, Ltd., 2003 – 2008
-Board of Directors, eHarmony, Inc.
-Board of Directors, Baidu, Inc. (Beijing), July 2004 – present
-Board of Directors, 99Bill Corporation (Shanghai)
-National Board of Directors, Teach for America.Penner and Carrie Walton Penner are also listed as having given between $25,000 and $49,999 (date unknown) to the Bay Area region of Teach for America.
-Director, The Charter Growth Fund, “a non-profit venture capital fund working to transform K-12 education by investing in innovative charter school networks that offer outstanding educational options for underserved students.”
-Stanford Graduate School of Business Advisory Council
In May 2008, the Walton Family Foundation gave Stanford University $4 million with which to support the John W. Gardner Center for Youth and Their Communities (Stanford School of Education). Greg and Carrie Penner reportedly recommended that the Family Foundation give this gift. Carrie Penner graduated from Stanford’s School of Education’s Administration and Policy Analysis program in 1997.[15]
https://archive.ph/dUkI8
He's also a Trustee of "The Corporation of Brown University" and will be until 2026
https://www.brown.edu/about/administration/corporation/members/greg-penner
I guess Madrone's $1 Billion dollar investment in Hyatt got him a seat at the table - Penner sits on the Hyatt Finance Committee.