Established in 1959 providing the best in high technology time systems. Unifying HR technology from Time, Attendance, Scheduling, Payroll, and other HCM Offerings. While this page features HR technology, IEC also provides Fire Alarm, Fire Suppression, Security, and Controlled Parking Systems with UL listed Central Station Monitoring services. Prompt, responsive customer service and strong technical support with factory-trained technicians are provided for all of our products. IEC is a Tennessee state-licensed alarm systems contractor with offices in Chattanooga and Nashville.