Alarm Specialist & Electronics provides service, installation and monitoring of alarm systems, fire systems, camera systems, access control and networking.

Custom Engineering is a U.S.-based consulting engineering firm founded in 1974, providing engineering design services for commercial, industrial, institutional, and rehabilitation projects. Its core disciplines include mechanical, electrical, plumbing, lighting, IT/low-voltage, and commissioning services. The IT/Low Voltage practice includes Access control, Video surveillance / CCTV, Fire alarm systems, Intrusion and duress alarms.

Digital Monitoring Products, Inc. is a family-owned manufacturer of electronic burglar/fire/access products. Since 1975, the company has designed, built, distributed & supported the products from headquarters in Springfield, MO. DMP offers intrusion control panels, wireless, network and cellular communications, access control, central station fire alarm control panels, DOD SCIF or high security IDS systems, intrusion systems and more.

Now a Custom Engineering Company, TIE Consulting specializes in the planning, design, and construction management of low-voltage systems. It has significant involvement in electronic security and low-voltage systems, including Access control, Video surveillance, Integrated security, Intrusion alarms, Duress alarms, Weapons detection, Emergency/security intercommunications, Fire alarm systems, Emergency communications, and public-safety systems.