An instrumentation technician installs, maintains, calibrates, and repairs various measurement and control instruments in industries like manufacturing, energy, and food processing. They ensure the accurate and efficient operation of processes by working with sensors, valves, controllers, and computer systems, requiring skills in electronics, mechanics, troubleshooting, and reading technical diagrams. The role involves diagnosing and resolving equipment problems, performing risk assessments, and working with engineers to optimize system performance and safety.