Senior Instrument Engineer


Petrofac is seeking a Senior Instrument Engineer- Contractor for 6 months based in Aberdeen, UK.

The role is outside IR35 and we invite Limited Companies to engage.

Scope of Services:


  • Provide engineering input to estimates for project work scopes 
  • Provide input to progress and planning meetings 
  • Provide technical expertise to specify modifications to existing equipment or purchasing new equipment including but not limited to: 


    • DCS, ESD F&G and Metering system modifications
    • Field Instrumentation including Pressure, Level, Temperature, Flow and Specialist Measurements.
    • Valves
    • SIL, High Integrity Systems (HIPPS)
    • Measurement and Metering
    • Industrial Networking and Communications


  • Provide technical expertise to the resolution of technical queries ensuring that all design changes are captured by the change control process 
  • To be able to conduct site surveys on offshore or onshore assets 
  • To be able to produce calculations required for the role and participate in design reviews
  • Provide checking and approval of discipline documents; complete interdisciplinary checking of documents where necessary 
  • Production of discipline documentation deliverables for inclusion in work packs 
  • Compliance with company engineering procedures, industry, international and client codes and standards  
  • Ensure that all work complies with the Contract Health, Safety, Environmental and Quality policies and procedures as appropriate. 



  • Control system philosophy and Software scopes of Work   
  • Specifications  
  • Vendor Statement of Requirements  
  • Preparation & Issue of Survey Reports 
  • PEPs 
  • Instrument and I/O Schedules  
  • Instrument / Equip / JB / IO / Alarm Schedule 
  • Label Schedules  
  • Orifice Plate / Valve /IS/Cable and General Calculations 
  • Equipment Data Sheets 
  • Requisition (Including SDRL) 
  • SIL Assessment  
  • Spares/Equipment List 
  • Weight control sheets 
  • MELS and MDRS 
  • Workpack input  


Design deliverables to check:

  • Block Diagrams or Single line diagrams  
  • Cause & Effect Diagrams 
  • Instrument Cable Block Diagram  
  • Cable Tray Routing & Layout Diagrams   
  • Panel; Control Room; F&G and Equipment Room Layouts  
  • Panel Wiring Diagram 
  • Destruct Drawing  
  • Instrument Mounting / Support Details 
  • Logic & Loop Diagrams 
  • Schematic Diagrams  
  • Cable Interconnection Diagrams  
  • Cable; Panel & Junction box Termination Diagram  
  • Junction Box Termination Diagram  
  • Pneumatic; Chemical and Hydraulic Hook-up Diagram  
  • Pneumatic; Chemical and Hydraulic Hook-up Schematic 
  • Installation or story board diagrams to facilitate understanding   
  • Cable Schedule  
  • Requisition – Bulk Bill of Materials 



Additional Information

    To apply for this job please visit