Army Contracting Command – Rock Island seeks a contractor to provide comprehensive on-site maintenance, repair, and technical support for mission-critical Electronic Security Systems, including Intrusion Detection Systems and Access Control Systems, at Crane Army Ammunition Activity (CAAA). The contractor must provide all personnel, supervision, and services for preventive maintenance, software/firmware updates, 24/7/365 emergency technical support, and repair or replacement of system components. The requirement is a 100% small business set-aside under NAICS 561621, with a single firm-fixed-price contract anticipated; SAM registration is required, and evaluation factors include past performance, price, and the required site visit. A mandatory site visit will be held October 19, 2026, 9:00–11:00 AM EST at CAAA, and attendees must complete the attached visitor form. The period of performance is a base year plus four option years, with actual dates provided at award.