CUSTODIAL SERVICES Professional Diversified Services, Inc. custodial management systems sets the standards for your custodial services and carefully monitors the results. PDSI’s custodial comprehensive program delivers professional facilities cleaning and management. We approach our goals within a frame work that complies with regulatory agency requirements. PDSI areas of expertise: Cost accounting and control Clean rooms services Industrial Services Quality Controls & Inspections Operations Manuals & Procedures Manpower planning & control