Abacus Corporation was established in 1944 as a contract cleaner specializing in commercial janitorial maintenance. The company offers professional security and patrol services, commercial housekeeping, landscape management and staffing services through different divisions. The firm provides placement services to light industrial, clerical, hospitality, toll collection, flaggers and assembly line production employees. It conducts a comprehensive 10-panel drug test, and an in-depth criminal background check on each candidate. The company s security division serves clients in the Middle Atlantic States. Its commercial housekeeping department is one of the leading cleaning contractors offering cleaning and polishing services. The firm s landscape management division uses scientific approach to turf management, tree removal, plant installation, fertilization, and insect and disease control. Abacus Corporation is headquartered in Baltimore, and manages regional offices located in Virginia, Washington, D.C., Delaware, North Carolina, Georgia, New Jersey and Pennsylvania.