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At Pipe Pro Solutions, we are driven by a simple yet powerful idea: to deliver superior sewer line and water main line services more efficiently, more professionally, and more affordably than our competitors. We primarily service Alexandria, Virginia and surrounding areas.

Founded in 1985, Plexus Scientific Corporation is a CMMI Level-3 and ISO 9001:2008 certified consulting firm. Located in Alexandria, Va., it specliazes in offering environmental, safety, information technology, regulatory and business consulting solutions. The firm caters to United States governmental agencies, including the United States military, Department of Defense (DoD), the intelligence community, Department of Homeland Security, civil agencies and federal government agencies. Plexus Scientific Corporation operates through its different lines of business, which include facilities and asset management, business solutions, environmental engineering/consulting, safety/occupational health and Plexus LI, LLC.

Addx Corporation is a veteran-owned business management consultancy. It provides program management, technology and management consulting services. The company serves the departments of Defense, Homeland Security, Energy and Veterans Affairs. Addx Corporation offers program planning and execution, contract administration, professional staffing and program management office support services. Addx Corporation also provides training and simulation, studies and analysis, and strategic human capital, business and knowledge management services. Its technology services include technical authority, technology transition, information technology governance, and systems and domain engineering. The company is associated with the Armed Forces Communications and Electronics Association, National Defense Industrial Association and United States Naval Academy Alumni Association. Addx Corporation maintains one of its locations in Alexandria, Va.