David E. Schreiman

ARGOTEK, Inc. provides information assurance and systems security services. The firm specializes in information systems security engineering, information assurance enabling technology and standards, communications security, certification and accreditation, secure architecture development, key management applications and design and cryptographic evaluation or certification. The company was founded in 1998 and is headquartered in Centreville, VA.

PricewaterhouseCoopers LLC provides assurance, tax and advisory services. Its services include audit and assurance, consulting, deals, human resources, legal, tax, and family business. The firm also offers accountability, risk management, structuring, mergers and acquisitions, and performance and process improvement. The company was founded in 1998 and is headquartered in Buffalo, NY.

SPARTA, Inc. provides advanced systems engineering, cybersecurity and mission support services primarily to the defense and homeland security departments, and the intelligence community. The company was founded by Wayne R. Winton and is headquartered in Laguna Hills, CA.