Engineer, Pre-com & commissioning – GEP & SURF

Engineer, Pre-com & commissioning – GEP & SURF

A Pre-commissioning & Commissioning Engineer is responsible for planning, coordinating, and executing all activities required to prepare a subsea system for safe startup and operation. This includes mechanical completion verification, testing, cleaning, and system handover to operations.

• Develop/review pre-commissioning and commissioning procedures for subsea systems (Gas Export Pipeline, Flowlines, Subsea Xmas Trees, PLETs, manifolds, umbilicals).
• Review design documents (P&IDs, Isometrics, alignment sheets, datasheets).
• Define method statements for flooding, cleaning, gauging; hydrostatic testing; dewatering and drying.
• Prepare commissioning dossiers and system boundaries.
• Plan, execute, supervise, monitor, and manage pipeline/flowline cleaning (pigging, flushing); gauging to confirm internal diameter integrity; hydrotest (strength & leak test); test water sourcing, treatment, and disposal; chemical dosing (corrosion inhibitor, oxygen scavenger); ensure compliance with specifications and codes (SNI, DNV, API).
• Dewatering using air or nitrogen pigging; drying to required dew point (e.g.,
  -20°C or lower); dewatering/drying measurement; prepare pipeline for hydrocarbon introduction.
• Leak testing.
• Interface with topside/FPSO/onshore facilities and support first hydrocarbon introduction.
• Offshore execution on lay vessels, construction vessels, FPSO; supervise subcontractors and vendors; ensure execution aligns with project schedule and safety standards.
• Documentation & handover: prepare test reports, punch lists, system completion certificates (RFSU / RFO), compile commissioning dossiers for handover to operations team; ensure all QA/QC documentation is complete and approved.
• HSSE compliance: implement HSSE procedures; ensure safe handling of high-pressure systems and chemicals.

• Mechanical Engineering
• Offshore / Ocean Engineering
• Civil Engineering

• Minimum 10 years solid experience in pre-commissioning & commissioning of subsea system in oil & gas.

• Strong knowledge of pigging operations and hydrotesting standards.
• Familiarity with codes: SNI, DNV-ST-N001, API, and other Oil & Gas international standards.
• Strong coordination & leadership offshore; problem-solving under pressure; effective communication with multidisciplinary teams.