William M. Diefenderfer III & Family – Bio Information

Mr. William M. Diefenderfer III

Born: May 3, 1945
Native of Wayne, PA
Current residence: Northern Virginia
Party Affiliation: Republican
Military service: US Army (1970-72)
University: BA, Dickinson College, Carlisle, PA (1967)
Law School: JD, Duquesne University School of Law, Pittsburgh, PA (1973)
Law School: LLM, Kings College, University of London (1974)

Law Firm Associations:

Diefenderfer Hoover Boyle & Wood (Pittsburgh, PA), Partner (1991- current)
310 Grant Street # 1420
Pittsburgh, PA 15219-2315
Phone: (412) 471-1100

Wunder & Diefenderfer Partner (Washington, DC), Partner (1986-89)
McNair, Glenn, Konduros, Corley, Singletary, Porter & Dibble (South Carolina, later known as The McNair Firm), Partner (1983-84)

Lobbying Registrations:

William Diefenderfer III: Reported Lobbying Revenues

Government Service:

Commissioner, Commission on the Future of American Veterans (2006-NA)
Member, Standing Advisory Group, Public Company Accounting Oversight Board (2004-05)
US Office of Management and Budget, Deputy Director (1989-91)
Congressional Staff Chief of Staff and Counsel to the Chair, Senate Finance Committee (1985-86)
Congressional Staff Chief Counsel, Senate Committee on Commerce (1979-83)
Congressional Staff Legal Counsel to Rep. Bruce Caputo (1977-79)
White House Staff Asst. Dir., Domestic Council (1976-77)

Entrepreneurial Pursuits:

Enumerate Solutions, Inc., Co-Founder (with Russell T. Davis), CEO and President (2000-02), Vice-Chairman and chair of Audit Committee (current)
Icarus Aircraft, Inc. Treasurer and CFO (1992-96)

Independent Board Memberships:

Member of the Board of Chart House Enterprises, Inc. (1991-2002)
Member of the Board of Sallie Mae/SLM, Inc. and, over different years, member of Audit, Nominations & Governance, Compensation & Personnel and Finance & Operations Committees (1997- current)
Member of the Board of Trustees of U-Store-It Trust (2004- current, as Chairman, 2007- current)
Member of the Board of The Hamilton Securities, Inc. (1995 – 97)

Political Pursuits:

The Freedom Project (John Boener’s PAC)
Friends of Newt Gingrich
Advisor, Senator Kit Bond and Republican Convention, 1996

Political Contributions:

William M. Diefenderfer III: Reported Federal Contributions

Notable Charitable Donations

Mr & Mrs William M. Diefenderfer: Donation to Duquesne University
As of 1997, Advisor, Nelson Rockefeller, Jr.

Related articles:

Sandra Diefenderfer’s Property Assessment Questions

Selected Press Clippings

Enumerate Cofounder Bill Diefenderfer is Interviewed on CEOCAST
enumerate.com (23 June 2000)

Buyouts: The LBO Lobby Makes Its Move on Washington
Washington Decoded (Sept/Oct 1989)

Kohlberg Kravis Roberts (KKR)


Sandra Hoover Diefenderfer

Brief Biography Board of Directors IUP
Sandra Hoover Diefenderfer graduated in 1967 from Indiana University of Pennsylvania with a bachelor’s degree in Elementary Education. She received a Master of Education degree specializing in Learning Disabilities from the University of Maryland in 1978.

Sandy taught Elementary Education and Special Education in both the Prince George’s County and Montgomery County Maryland school districts. After a long career in teaching, Sandra retired and became a volunteer in the development office for the National Capitol Children’s Hospital. She also tutored inner city children for the I Have a Dream Foundation.

Sandy joined the IUP Alumni Association board of directors in 2004 and serves as a member of the finance and nominating committees. In addition to attending many on-campus events, she also represents IUP at many social and networking events in the D.C. area.

Sandy lives in Great Falls, Virginia, with her husband, Bill.



Barret Diefenderfer 3rd
Brief Biography
1st Lt, Defense Counsel, United States Marine Corps
Jacksonville, North Carolina Area Military
First Lieutenant at United States Marine Corps
Fellow at The Commission on the Future of America’s Veterans
Advising Attorney & Legislative Affairs at Association of Corporate Travel
Staff at Ways & Means Committee House of Representatives
Field Representative at Young Republican Leadership Fund
Duquesne University School of Law
Lafayette College
222 connections
Company Website
Public Profile

First Lieutenant
United States Marine Corps
Government Agency; Military industry
August 2009 – Present (2 years)

Defense Counsel, LSSS, CLR-27, 2d MLG
The Commission on the Future of America’s Veterans
Public Policy industry
March 2008 – January 2009 (11 months)

Advising Attorney & Legislative Affairs
Association of Corporate Travel Executives
Nonprofit Organization Management industry
February 2007 – March 2008 (1 year 2 months)

Ways & Means Committe House of Representatives
Government Agency; 51-200 employees; Government Administration industry
November 2006 – January 2007 (3 months)

Field Representative
Young Republican Leadership Fund
Privately Held; 11-50 employees; Political Organization industry
September 2006 – November 2006 (3 months)

Barret Diefenderfer’s Education

Duquesne University School of Law
2002 – 2005

Lafayette College
B.A., Government and Law
1998 – 2002

Activities and Societies: Captian of D-1AA Football Team, Two Time NCWA
All-American Wrestler, President of Theta Delta Chi


The fall issue was lovely as always. However, I find it disheartening that in focusing on millennials, no mention is made of alumni actively serving in the military, including Jeffrey Werrell 02 and Barret Diefenderfer 02, who are with the United States Marine Corps. There are most certainly others. Wouldn’t you agree that serving in the military makes a difference?

Sandra J. Diefender (P 02)
Great Falls, Va.

Lafayette Alum, Class of ’02


William M. Diefenderfer, IV

Trinity Pawling, Class of 1997

Trinity Pawling School

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