The Senior Field Instrumentation Technician performs and leads field-level instrumentation activities including installation, calibration, diagnostics, loop checking, and maintenance of critical plant instrumentation. The role requires technical expertise, adherence to safety standards, and the ability to support junior technicians and interface with other disciplines for seamless plant operations.
Perform and guide the installation, loop checking, and commissioning of field instruments.
Interpret P&IDs, loop diagrams, and wiring schematics to verify proper installation.
Assist in setting up and testing instrumentation systems during new project rollouts or modifications.
Calibrate instruments such as pressure, temperature, flow, and level transmitters, control valves, and analyzers using certified tools (e.g., HART communicator, multifunction calibrators).
Ensure all calibrations are documented and conform to QA/QC and ISO standards.
Carry out preventive and corrective maintenance on a wide range of field instrumentation.
Troubleshoot instrument faults including signal loss, inaccurate readings, and wiring issues.
Support unplanned shutdowns by providing quick and accurate diagnostics and solutions.
Follow and enforce permit-to-work, lockout/tagout (LOTO), and confined space entry procedures.
Ensure all instrumentation work complies with ATEX/IECEx zoning and intrinsically safe practices.
Participate in risk assessments (JSA/HIRA) and root cause analysis for failures.
Support and guide junior technicians during calibration, testing, and fault diagnosis tasks.
Maintain accurate logs of daily work, calibration reports, and shift handovers.
Report abnormalities to the Instrumentation Engineer or Supervisor with recommended corrective actions.
Strong hands-on knowledge of field instrumentation, loop tuning, and signal tracing.
Proficiency with test and calibration tools (e.g., Fluke, Druck, Beamex, HART communicator).
Understanding of analog/digital signal processing, instrument communication protocols (e.g., HART, Modbus).
Ability to read and interpret instrument datasheets, loop drawings, and hook-up diagrams.
Strong safety awareness and attention to detail under pressure.
ITI / Diploma in Instrumentation, Electronics, or Electrical Engineering.
8–15 years of experience in field instrumentation, especially in oil & gas, power, or chemical industries.
Familiarity with international standards (ISA, IEC) and hazardous area instrumentation.
Experience working with DCS/PLC interfaces, control valves, and smart transmitters.
Exposure to SIL-rated systems or safety instrumentation is an added advantage.