> SUSTAINABLE BUILDING SOLUTIONS, LLC District of Columbia Since: 2009 SUSTAINABLE BUILDING SOLUTIONS, LLC
> SETTY & ASSOCIATES INTERNATIONAL PLLC District of Columbia Since: 2002 SETTY & ASSOCIATES INTERNATIONAL PLLC
> SOIL AND LAND USE TECHNOLOGY, INC District of Columbia Since: 1976 SOIL AND LAND USE TECHNOLOGY, INC
> R & R JANITORIAL, PAINTING & BUILDING SERVICES INC. District of Columbia Since: 1994 R & R JANITORIAL, PAINTING & BUILDING SERVICES INC.
> RELIANCE CONSTRUCTION MANAGEMENT CO District of Columbia Since: 2011 RELIANCE CONSTRUCTION MANAGEMENT CO
> REGIONAL CONTRACTING SERVICES LLC District of Columbia Since: 2001 REGIONAL CONTRACTING SERVICES LLC