Interior Systems Inc. dba., ISI Professional Services was founded in 1991 and is a Washington, D.C. based provider of professional real estate, facilities and administrative services to federal government agencies and commercial clients. ISI is a Service Disabled Veteran Owned Small Business (SDVOSB) and is a graduate of the Small Business Administration’s (8)a Program. ISI’s President , Lawrence K. Doll, is a former Marine and a disabled veteran of the Vietnam War. ISI maintains a policy of hiring veterans and in particular returning disabled veterans to support our clients. ISI holds a TOP SECRET facility clearance, is registered at E-Verify for employee verification and its accounting systems have been approved by the Defense Contract Audit Agency (DCAA).

Since its inception, ISI has provided Integrated Occupancy Services to the General Services Administration (GSA) and other federal agencies. Integrated Occupancy Services are any service required in the occupancy of space. ISI maintains six GSA Federal Supply Schedules to provide federal clients its services.