Consulting firms in Oklahoma

BDO Global is a worldwide professional services network of public accountancy firms, serving national and international clients. Each BDO Member Firm is an independent legal entity in its own country. The network, originally formed in 1963 as Binder Seidman International Group, is coordinated by BDO Global Coordination B.V., with an office in Brussels, Belgium. The name BDO, first devised in 1973, is an acronym of Binder Dijker Otte & Co.

Booz Allen Hamilton Inc. NYSE: BAH, or more commonly Booz Allen, is an American public consulting firm headquartered in McLean, Fairfax County, Virginia, with 80 other offices throughout the United States. Ralph Shrader is its Chairman and Chief Executive Officer. The firm was founded by Edwin Booz in Chicago circa 1914. It is listed as number 438 in the 2011 Fortune 500.

Deloitte Touche Tohmatsu Limited /dəˈlɔɪt ˈtuːʃ toʊˈmɑːtsuː/, commonly referred to as Deloitte, is a multinational professional services firm headquartered in New York City in the United States.

GDH Consulting Inc is a specialized consulting and staffing firm focused on providing qualified candidates within the Information Technology, and Consulting industries to commercial and government sectors. Named to America's fastest-growing private staffing firms 2008 and Inc. magazine's fastest growing companies in America.

ICF International, formerly known as ICF Consulting, is a management, technology, and policy consulting firm based in Fairfax, Virginia. ICF International partners with government and commercial clients to deliver professional services and technology solutions in the energy, environment, and transportation; health, education, and social programs; and homeland security and defense markets.

Leidos, formerly known as Science Applications International Corporation (SAIC), is an American defense, aviation, information technology (Lockheed Martin IS&GS), and biomedical research company headquartered in Reston, Virginia, that provides scientific, engineering, systems integration, and technical services. Leidos merged with Lockheed Martin's IT sector, Information Systems & Global Solutions, in August 2016 to create the defense industry’s largest IT services provider.

PricewaterhouseCoopers is a multinational professional services network headquartered in London, United Kingdom. It is the largest professional services firm in the world, and is one of the Big Four auditors, along with Deloitte, EY and KPMG. Vault Accounting 50 has ranked PwC as the most prestigious accounting firm in the world for seven consecutive years, as well as the top firm to work for in North America for three consecutive years.

RSM International is a professional services network. It is the 6th largest accounting network of independently owned and managed accounting, auditing and tax firms with over 700 offices in 80 countries.