Joseph Patrick "Joe" Lockhart (born July 13, 1959) is a spokesman and communications consultant, best known for being the White House Press Secretary from October 5, 1998 to September 29, 2000, during the administration of U.S. President Bill Clinton.
 He worked as press secretary for several Democratic politicians, including Walter Mondale, Paul Simon, and Michael Dukakis; he was an advisor to John Kerry during his 2004 presidential campaign.
 He subsequently founded and became managing director of the communications consulting firm Glover Park Group, a position he held until June 2011, when Facebook recruited him to become its company spokesman.
 In 2013, he rejoined Glover Park Group.
DCI Group is an American public relations, lobbying and business consulting firm based in Washington, D.C. The company was founded in 1996 as a consulting firm, and has since expanded its practice to become a public affairs company offering a range of services.
 DCI Group provides communications and advocacy services to clients including large US corporations, trade associations, non-profit organizations, and government organizations including educational institutions.
 Services include communication campaigns to solicit public action on legislative issues, the creation of grass-roots fronts for corporate campaigns,
Bennett Offshore, L.L.C., is an independent naval architecture, design and consulting firm founded in 1997 by William T. Bennett, Jr., to deliver engineering services to the offshore industry.
 Bennett headquarters are located in Houston, Texas, and the company has an engineering office in New Orleans, Louisiana.
 Bennett Offshore provides traditional naval architecture, structural, mechanical and electrical engineering as well as hydrodynamics and other marine- and offshore-related services.
 In addition, the firm is involved in design, modification, and construction supervision of marine vessels, liftboats and other offshore mobile drilling and production units.
 Bennett Offshore worked in collaboration with the Offshore Technology Development group of Keppel Offshore & Marine to design the ORCA series of self-propelled, self-elevating platforms.
Anthony Holm is an American communications strategist, lawyer and author.
 Holm co-founded a political consulting firm, The Patriot Group, in 2006.
 He has served as special project director for Rick Perry, the former Governor of Texas.
 In October 2008, Holm founded The First Amendment Alliance.
 The First Amendment Alliance Education Fund was founded in order to expose corruption and inconsistencies both in the government and the public sector.
 He has also worked as a spokesman and consultant for Republican mega-donor Bob Perry and his company Perry Homes, as well as Texas Attorney General Ken Paxton and Texans for Education Reform.
The Glover Park Group is an American communications consulting firm headquartered in Washington, D.C. The company was founded in 2001 by former White House and Democratic campaign officials Carter Eskew, Michael Feldman, Joe Lockhart and Chip Smith.
 The firm is known for its public relations, advertising, opinion research, and lobbying services.
Michael Feldman (born October 14, 1968) is an American public relations and communications consultant and a former Democratic political adviser.
 Feldman was Vice President Al Gore’s traveling chief of staff during the 2000 presidential election campaign.
 He is a founding partner and managing director of The Glover Park Group, a communications, consulting and advocacy firm.
Hammes Company (or Hammes Co.) is a healthcare consulting firm, providing strategic planning, facility development and real estate advisory to the healthcare industry.
 Headquartered in Brookfield, Wisconsin, Hammes Company grew from a real estate consulting firm founded in 1991 to the No. 1 developer of health care facilities in the United States by 2000.
 With the 2007 acquisition of Health Inventures, Hammes Company expanded its presence into worldwide markets.
Christopher (Chris) Ingram (born June 2, 1971) is the president and founder of 411 Communications , a public opinion research and communications consulting firm based in Tampa, Florida, and is publisher of Irreverent View .
Diamond Management & Technology Consultants (casually referred to as Diamond) was an independent management consulting firm founded in 1994, headquartered in Chicago, IL with satellite offices in Hartford, CT, New York City, Washington DC, London, and Mumbai.
 It was acquired by the British firm, PwC in 2010.
 Diamond was a smaller player among companies such as Mercer Management Consulting, Deloitte Consulting, and Accenture.
 The industry segments under which Diamond operated include consumer packaged goods, financial services, and health-care, among numerous others.
XIO Strategies (XIO) is a supply chain management and communications consulting firm, headquartered in Vienna, Virginia.
 XIO provides consulting services in areas such as business process analysis, program management, technology deployment, technical writing, systems training and communications program development.
 In January 2011 Cubic Corp. announced plans to purchase XIO Strategies, making the company part of Cubic Global Tracking Solutions, which Cubic formed in 2010 when it acquired Impeva Labs.

Question: What is the name of the American communications consulting firm founded in 2001 by Carter Eskew, Michael Feldman, Joe Lockhart and Chip Smith, that's headquarters are located in Washington D.C.?
Answer: The Glover Park Group