Job Description Roles & Responsibilities Lead and perform instrumentation design activities for FEED and DD phases. Prepare and review: Instrument Index and Datasheets, P&IDs (instrumentation scope), Control Philosophy / Functional Design Specifications, Cause & Effect Diagrams, Loop Diagrams, Wiring Diagrams, Instrument Hook-ups and Installation Drawings Ensure design compliance with ADNOC Onshore standards and project specifications. Design and specify: Distributed Control Systems (DCS), Emergency Shutdown Systems (ESD), Safety Instrumented Systems (SIS), Fire & Gas Systems (FGS) Participate in SIL classification and verification as per IEC 61508 / 61511. Define control strategies and system architecture. Prepare Material Requisitions (MR) and Technical Bid Evaluations (TBE). Review vendor documents for instrumentation-related packages. Ensure vendor compliance with project requirements and client standards. Coordinate with Process, Electrical, Mechanical, and Piping disciplines.