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Singleton represents companies and trade associations throughout a wide range of industries in matters related to international trade, transportation, energy and healthcare.

During her time on Capitol Hill, Singleton developed an extensive background in international development. She helped draft legislation that created the African Development Foundation (USADF); a government agency that supports African-led development and community growth through the provision of seed capital and technical support. She went on to serve as an advisory board member of USADF for 10 years. In 1996, then President, Bill Clinton, appointed Singleton as General Counsel of the United States Agency for International Development. During her five-year tenure, she was the chief legal advisor to 72 U.S. missions around the world.

Singleton has been on the Board of Directors of public utility holding company, Alliant Energy since 2001. She served on the Board of United Rentals, the largest equipment rental company in the world, from 2004-2018.

Singleton is a senior advisor at Husch Blackwell Strategies, offering lobbying and government affairs consulting.




  • Capital Pro Bono Honor Roll, 2018
  • NACD Directorship 100: Directors, 2019
  • Virginia State Board of Elections, Secretary, 2018-2019
  • African American Managing Partners Network, African American Outside Counsel Recommendations, 2016
  • Directors & Boards Magazine, 2016 Directors to Watch
  • Savoy Magazine, Power 300: The Most Influential Black Corporate Directors, 2016
  • Washington Power Players, 2013
  • On Being a Black Lawyer magazine, "Top Black Lawyers with Influence," 2012; "Top Lobbyists and Influencers," 2014  
  • Elizabeth City State University, Honorary Doctor of Humane Letters, 1998
  • "Distinguished Women in International Law," International Law Section of the Federal Bar Association in the International Law Forum, District of Columbia, 1997
  • United States Agency for International Development, Presidential Appointment as General Counsel, 1996-2001
  • Women in Government Relations, Most Distinguished Member Award, 1996
  • Who's Who in American Politics, 1983-1984; Who's Who in American Law, 1991; International Who's Who of Professionals, 1994
  • 2,000 Notable Women Award, 1991
  • Lyndon B. Johnson Congressional Internship, 1975


  • J.D., Howard University School of Law
  • B.A., University of Maryland


  • District of Columbia
  • Pennsylvania
  • U.S. Supreme Court

Professional Associations and Memberships

  • American Bar Association
  • Council on Foreign Relations
  • District of Columbia Bar Association
  • National Bar Association
  • National Women's Business Center, Former Chair
  • Women in Government Relations, Inc., Past President
  • The Executive Leadership Council, Class of 2017
  • National Academy of Public Administration’s Equal Employment Opportunity Commission Human Capital Plan Project, 2002
  • National Academy of Public Administration, Fellow, 2000
  • Democratic National Committee Women Leadership Forum, 1995
  • Greater Washington Board of Trade, Federal Affairs Committee Member, 1991-1994
  • Congressional Black Caucus Advisory Board, 1991
Community Leadership
  • University of Maryland, Board of Visitors, Board Member, 2008-present
  • Port Discovery Children’s Museum, Board Member, 2008-2014
  • Constituency for Africa, Board of Directors, 2006
  • Global Rights, Board of Directors, 2001-2014