Instrumentation and Control Technician positions install, test, adjust, modify and maintain digital and analog circuitry, microprocessor-controlled devices, programmable logic controllers, variable frequency devices, electric valve actuators, process control equipment, telemetry devices, sensors, and controllers on a wide variety of water and wastewater treatment process instruments and devices; write, modify and test complex relay ladder logic or function block instruction sequences in the form of computer programs to monitor and control water or wastewater treatment processes; operate computer terminals, portable programming units or other complex electronic test equipment to analyze and troubleshoot instrumentation and control systems; perform mathematical computations to calibrate instruments and determine values of inputs and outputs in computer programs; maintain records of work performed; and perform other duties as assigned. Four years of full-time experience assembling, installing, maintaining, and calibrating microprocessor-based control equipment, electronic instrumentation and control equipment (e.g., distributive control systems or programmable logic controllers), security systems, video cameras, access control systems, or telemetry equipment which MUST include two years of full-time troubleshooting and repair experience of electronic control systems and electrical equipment used in industrial process automation.