Stephen W. Porter

Arnold & Porter LLP is engaged in the provision of legal services. It offers transactional, regulatory, and litigation services in the areas of antitrust and competition, appellate and supreme court, attorney liability, bankruptcy and corporate restructuring, compensation and benefits, congressional investigations, consumer product safety, consumer protection and advertising, corporate and securities, derivatives and commodities, financial services, government contracts, intellectual property, international arbitration, international trade, labor and employment, legislative and public policy, litigation, national and homeland security, private client services, product liability litigation, public international law, real estate, and white collar criminal defense. The company was founded by Thurman Wesley Arnold, Paul Aldermandt Porter, and Abraham Fortas in 1946 and is headquartered in Washington, DC.

ManTech International Corp. engages in the provision of information technology and technical services solutions. It also offers cyber security, software and systems development, enterprise information technology, multi-disciplined intelligence, program protection and mission assurance, system engineering, test and evaluation, command, control, communications, computers, intelligence, training, supply chain, and management consulting. The company was founded by George J. Pedersen in 1968 and is headquartered in Herndon, VA.

Washington Performing Arts Society operates performing arts communities. The non-profit company is based in Washington. The CEO of the American company is Jenny Bilfield.

The DC Chamber of Commerce is a chamber of commerce organization based in Washington.