Job Description

Location
Doha, Qatar
Experience

Job Type
Recruitment

Position: Senior Instrumentation Engineer - Offshore Brownfield (Oil & Gas)

Roles & Responsibilities

Qualifications & Experience:

Bachelor's degree in Instrumentation or Electronics Engineering.

Minimum of 12 years of relevant experience, including at least 3 years in brownfield construction and

commissioning projects in the oil & gas sector.


Strong background in detailed design and engineering of DCS, ESD, PLC, F&G, SCADA systems, and

field instrumentation.


Proficient in interpreting and developing instrumentation documentation, including drawings, datasheets,

specifications, MTOs, test reports, and installation details.


Solid understanding of international instrumentation standards such as IEC, ISA, IEEE, NEC, API,

ATEX, etc.

Design & Engineering Responsibilities:

Develop and review instrumentation deliverables, including:

o Instrument Location Layouts


o Cable Routing & Trench Layouts


o Junction Box & Control Room Layouts


o F&G System Layouts


o Hook-Up Drawings


o Instrument Index, I/O List, Wiring Diagrams, Loop Diagrams, and Cause & Effect Matrices.


Prepare and review Instrument Datasheets in accordance with project requirements.

Select appropriate field instruments, control valves, analyzers, and bulk materials based on system design

and process requirements.


Perform technical bid evaluations (TBE) and vendor document reviews for instrumentation packages.

Carry out cable sizing and selection based on system design parameters.

Construction Support:

Review IFC drawings, vendor documents, and construction method statements for constructability and

compliance.


Provide field engineering support during installation of trays, cable routing, terminations, junction boxes,

lighting, grounding systems, and instrument hook-ups.


Ensure adherence to project safety standards, QA/QC requirements, and applicable international codes.

Interface with structural, mechanical, and piping disciplines to manage interdisciplinary coordination in

brownfield environments.

Brownfield Project Responsibilities:

Conduct site surveys to assess existing installations and determine optimal tie-in points for new systems.

Evaluate and support the development of shutdown work packs to ensure feasibility and execution within

restricted shutdown windows.


Identify and resolve site clashes by proposing effective field engineering solutions.

Ensure all modifications align with hazardous area classification and safety requirements.

Technical Proficiency:

Competent in AutoCAD for development of various instrumentation drawings and layouts.

Familiar with the selection, sizing, and calibration of instrumentation related to flow measurement (e.g.,

orifice plates, nozzles, venturi tubes, vortex, turbine meters) in accordance with ISO standards and


manufacturer guidelines.


Sound knowledge of instrument safety classifications and hazardous area requirements.

Commissioning & Testing:

Extensive experience in installation, testing, inspection, pre-commissioning, and commissioning of

instrumentation systems including:


o DCS, ESD, PLC, F&G Systems


o SCADA, Analyzers, and associated instrumentation infrastructure.


Provide technical leadership during commissioning phases to ensure system integrity and operational

readiness.