Terrence M. Ryan

Leidos, Inc. provides scientific, engineering, systems integration and technical services and solutions. It offers solutions and services that leverage the power of data analytics, systems integration, and cyber security across national security, health, and engineering markets. The company was founded by John Robert Beyster in June 1969 and is headquartered in Reston, VA.

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.

SRA International, Inc. provides technology and strategic consulting services and solutions. It offers information technology solutions and professional services that enable mission performance, improve efficiency of operations or reduce operating costs. The firm’s information technology service offerings include infrastructure services, software development, systems integration, cyber security, cloud computing, business intelligence, data analytics and mobile solutions. The company also provides mission-specific domain expertise in areas such as intelligence analysis, energy and environmental consulting, enterprise logistics and bioinformatics. The company was founded by Ernst Volgenau in 1978 and is headquartered in Fairfax, VA.

Arthur Andersen LLP used to provide accounting services. It was also into consulting services for clients that operate businesses throughout the United States and around the world. Arthur Andersen was founded in 1913 and was headquartered in Chicago, IL.

SIAC Construction Ltd. provides construction services. The company offers residential, commercial, industrial, property development, and engineering projects services. It has operations across Ireland and the United Kingdom. The company was founded in 1913 and is headquartered in Dublin, Ireland

Glen Dimplex Group engages in the manufacture of electrical heating appliances and provision of renewable energy solutions. It offers domestic appliances and heating and ventilation products. The company was founded by Martin Lawrence Naughton in 1973 and is headquartered in Dublin, Ireland.

Element Six (Pty) Ltd. provides cutting, grinding, drilling and polishing of metals, concrete, glass and other material. The company was founded in 1946 and is headquartered in Springs, South Africa.