Instrumentation Designer/Modeler

Roles & Responsibilities:

• Prepare and update 2D and 3D models of Instrument layouts, Junction box and marshalling cabinet layouts, Tubing and impulse line routing, Cable tray routing for instrument cables, Control room and local panel arrangements.
• Ensure proper instrument location with respect to accessibility, safety, and process requirements
• Generate and maintain accurate instrument index, location plans, and hook-up drawings
• Create and update Loop diagrams and wiring diagrams, Instrument hook-up drawings (process and pneumatic), Material take-offs (MTOs) for instrument bulk materials (tubing, fittings, trays, etc.)
• Model instruments and junction boxes in 3D platforms such as SP3D, E3D, or AutoCAD Plant 3D.
• Use tools like Navisworks, SmartPlant Review, or Intergraph tools for navigation and review.

Must Have Skills:

• Diploma or ITI in Instrumentation Engineering / Industrial Drafting.
• 7-10yrs of experience within the oil & gas or petrochemical industry.
• AutoCAD, MicroStation, SmartSketch
• SP3D, E3D, AutoCAD Plant 3D, SmartPlant Instrumentation (SPI / Intools)
• Understanding of field instruments (transmitters, switches, analyzers, control valves), junction boxes, and DCS/PLC systems.
• Knowledge of tubing, fittings, manifolds, impulse line routing, and instrument installation details.
• Awareness of IEC, ISA, API, and client specifications (e.g., Shell DEPs, Aramco, ADNOC standards).
• Experience in interdisciplinary model coordination and drawing checking for quality and completeness.

Expected Outcome:

• Instrumentation layouts and hook-ups that are safe, maintainable, and clash-free
• On-time completion of layouts, wiring diagrams, loop drawings, and 3D models as per project schedule.
• Accurate and clash-resolved instrument models within the overall plant design.
• Consistent, error-free drawings that reduce field modifications and installation issues
• Supports constructible and cost-effective installation of instrumentation systems