P558 Aircraft Prototype Facility, U.S. Department of the Navy, in NAS Patuxent River, Maryland
A General Contractor Serving Washington, DC Metropolitan Area Since 1951


Established in 1951, the John C. Grimberg Co. is a full-service general and mechanical contractor headquartered in Rockville, MD, and serving the entire Mid-Atlantic region.

Facility types constructed and/or renovated include: