The Custodians/Security Department is a support service of the Des Moines (Iowa) Independent Community School District. Responsibilities of the department do not stop with the care of the facility, but extend to providing a clean, safe environment for all who use school facilities. Program evaluation in the 1993-94 school year reveals a total operating budget of over $7 million, the bulk of which was for human resources costs. The department staff includes 3 central office administrators, 6 building managers, 282 custodians, and 6 security personnel. The department provides numerous in-service and staff development opportunities for its employees. The last 20 years have seen dramatic changes and technological advancement, making the process evaluation for the department more complex. Product evaluation reveals the delivery of a safe and clean environment, with constant attempts at improvement. The future provides an opportunity to predict and schedule almost all labor using technology, creating a predictable work environment where emergencies are minimized. Seven appendixes include job descriptions, staffing requirements, and sample evaluation forms. (SLD)