Our Board & Staff



Dianne Harnell Cohen | Chair

Dianne 1.JPG

One of the first two homeowners to purchase a lot in Serenbe, Dianne has served on the Serenbe Institute Board for five years.  She has chaired the Governance Committee which developed Serenbe Institute’s Strategic Plan, the nominating committee, and has served as Chair Elect. Dianne has served on many boards including chairing United Way Allocations, Park Pride, Piedmont Park Conservancy, the Atlanta Urban League, Leadership Atlanta and Success by Six. Dianne previously served as Deputy Chief of Staff to Governor Roy Barnes, Commissioner of Parks, Recreation and Cultural Affairs for Mayor Shirley Franklin and currently is proud to be affiliated with Atlanta Fine Homes/Sotheby’s International Realty.

Penny McPhee | Treasurer


Penny is the president and trustee of The Arthur M. Blank Family Foundation. Penny joined the Blank Family Foundation in 2004, from the John S. and James L. Knight Foundation in Miami, where she led the $1.8 billion foundation’s grant-making programs. Before entering the field of philanthropy, Penny had a distinguished career as a television producer and author.  Her television programs have won five Emmys, as well as other prestigious awards.  For seven years she was on the staff of WPBT, Miami’s public broadcasting station, where she launched its cultural affairs department and served as executive producer of cultural programming. Penny has a master’s degree from the Graduate School of Journalism at Columbia University, and was graduated with honors from Wellesley College, where she received her bachelor’s degree in English and theater arts.  

Tom Reed | Secretary


A Serenbe resident since 2006, Tom is a serial entrepreneur who has spent his working life creating and building successful startups. His businesses have been on the Inc. 500/5000 list of fastest growing companies 7 times. In his volunteer life, he led the incorporation of the City of Chattahoochee Hills, and has been a driving force behind the City’s zoning program, which will permanently preserve over 70% of the 40,000-acre municipality as forest and farm – a national model of conservation-oriented development. He volunteers as Mayor of the City, where he brings his entrepreneurial skills to bear on local and regional issues. In his spare time, he helped found the local charter school, mentors young entrepreneurs, serves on the Boards of several high-growth companies and local volunteer organizations, and on several committees of the Serenbe Institute.



George Danusis
Lynn Eden
Shirley Mitchell Ferrell
Michelle Mason
Doug Cloud
Deborah Griffin
Maria Rey-Marston

Garnie Nygren
Lauren Kane
Gil Mathis
Travis Townsend
Jane Blount
Joe Waters
Karen Windham



John Graham | Founding Executive Director

A current resident of Serenbe, John has served the Institute since 2005 and has overseen it's incredible growth to a $1m+ regional leader on the issues of cultural and environmental sustainability. He has held executive positions at the Seattle Symphony Orchestra, Oregon Symphony, Southern Methodist University's Center for Arts Administration and the Florida Philharmonic Orchestra. John currently serves on the City of Chattahoochee Hills Parks Commission.

Gretchen E. Butler | Director of Operations

Gretchen joined the Serenbe Institute in 2017 after three years as the Managing Director at the Serenbe Playhouse. She is responsible for creating and implementing strategies that will grow the Institute's programmatic and regional impact. Gretchen has been working as an arts administrator for over 20 years. She received her BA in Theatre from Randolph-Macon Woman’s College in 1998, and her MFA in Theatre Management from the Hilberry Theatre at Wayne State University in 2001. Upon completion of that degree, Gretchen moved to Atlanta and spent 5 years as a freelance Stage Manager. In 2006, Gretchen joined the staff of Georgia Ensemble Theatre as their Production Manager, a position she held for 8 years. In the summer of 2014, Gretchen joined Serenbe Playhouse as their Company Manager and in January of 2015 became their first Managing Director. Gretchen is a member of Phi Beta Kappa, Omicron Delta Kappa, and Atlanta Woman's Club.  She serves on the Board of Trustees of Kingswood United Methodist Church and the Capital Campaign Committee of The Sunflower Initiative, which funds scholarships for students attending women's colleges.