Principal Subsea CAD Engineer at International Energy Services Limited (IESL)

Incorporated in 1990, International Energy Services Limited (IESL) is a pan-African energy services company dedicated to delivering top-tier engineering and technical support services within the energy sector. Our operations extend beyond Nigeria to encompass other African countries, including Ghana, Mozambique, and Equatorial Guinea.

Our primary aim is to sustain our standing as a top three performer within our designated market segments. IESL has established enduring technical collaborations spanning more than 15 years with esteemed partners, Doris Engineering and STAT Marine. Furthermore, we have cultivated robust proficiency in supply chain management through strategic partnerships with various Original Equipment Manufacturers (OEMs). IESL proudly serves a comprehensive portfolio of International Oil Companies (IOCs).

We are recruiting to fill the position below:

Job Title: Principal Subsea CAD Engineer

Location: Lagos 
Employment Type: Contract

Job Purpose / Objective

• The Principal Subsea CAD Engineer is responsible for leading the development of detailed engineering drawings, 3D models, and design documentation for subsea structures, equipment, and pipeline systems.
• The role ensures that subsea design deliverables meet project specifications, industry standards, and client requirements.
• The position also provides technical leadership to CAD designers and supports multidisciplinary engineering teams during project execution.

Key Responsibilities

• Provide high-quality CAD drafting, modelling, and engineering documentation support for subsea hardware, structures, pipelines, umbilicals, and associated systems.
• Ensure drafting deliverables are accurate, consistent, and compliant with project standards, engineering requirements, and industry codes.
• Work closely with Subsea Hardware Engineers, Pipeline Engineers, and Systems Engineers to interpret engineering data and convert into CAD deliverables.
• Incorporate specifications, and equipment vendor information into drawings.
• Support subsea equipment configuration management and iterative design development through all project phases.
• Maintain drawing registers, metadata, revisions, and change tracking.
• Manage CAD file organization and ensure compatibility with project platforms.
• Update drawings based on: Installation contractor redlines, Fabrication yard mark-ups, Offshore site changes and as-built reports etc.
• Support offshore teams with drawing clarifications where necessary.

Typical Deliverables
Pipeline System Drawings:

• Pipeline Routing & Alignment Sheets: Horizontal and vertical profiles showing seabed topography and pipeline route.
• Pipeline Isometric Drawings: Detailed spool and joint configurations.
• Crossing Details: Drawings for pipeline crossings over existing infrastructure.
• Expansion Loop Layouts: For thermal expansion management.
• Pigging System Integration: Pig launcher/receiver interface drawings.
• Pipeline Approach: Field to FPSO.

Subsea Structures & Layout (topside-to-seabed):

• General Arrangement (GA) Drawings: Layout of manifolds, PLETs (Pipeline End Terminations), PLEMs (Pipeline End Manifolds).
• Structural Detail Drawings: Weld details, pad eyes, lifting points.
• Foundation & Mudmat Drawings: Soil interaction and stability details.
• ROV Access Drawings: Clearances for intervention tools.
• Layout: Field Layout, drill centre layout, cluster layout, subsea layout with/and without geophysical formations.

Umbilicals & Control Systems:

• Umbilical Routing Drawings: Path from FPSO to subsea distribution units.
• Umbilical Termination Assembly (UTA) Drawings: Connection details for hydraulic/electrical lines.
• Junction Box Layouts: For electrical and fiber optic terminations.
• Bend Restrictor & Stiffener Details: Compliance with minimum bend radius.

Tie-in Systems:

• Subsea tie-in interface drawings
• Tie-in Spool Drawings: Dimensional details for spools connecting pipelines to manifolds.
• Connector Interface Drawings: Hub profiles and gasket details.
• Jumper drawings
• Installation Sequence Drawings: Step-by-step visuals for subsea tie-in operations.

Process & Instrumentation:

• P&IDs (Process and Instrumentation Diagrams): For manifolds, pigging systems, and control modules.
• Hydraulic Schematics: Control fluid routing and valve actuation.
• Electrical Schematics: Power and signal distribution.
• PFDs
• PEFs.

3D Models:

• Integrated Subsea Layout Model: Full field layout including pipelines, structures, and umbilicals.
• Clash Detection Models: For verifying clearances and avoiding interference.
• Installation Simulation Models: For lifting and deployment planning.

Fabrication & Assembly Drawings:

• Component Fabrication Drawings: For manifolds, frames, and supports.
• Assembly Drawings: For subsea modules and skid packages.

Job Requirements & Soft Skills

• Bachelor’s Degree in Engineering, Engineering Design, Mechanical Engineering, or a related discipline.
• Experience in offshore/subsea CAD drafting.
• Professional certification in CAD Design or Engineering Design is an added advantage.
• 10 - 15 years of experience in engineering design within the oil and gas industry, particularly in subsea engineering or offshore projects.
• Proven experience working on subsea structures, pipelines, manifolds, and offshore installations.
• Experience supporting subsea FEED, detailed design, and/or installation engineering projects.
• Familiarity with major operators and OEM contractors.
• Excellent attention to detail
• Good communication with multidiscipline teams
• Ability to manage workload and prioritize deliverables
• Strong quality-focus and documentation discipline

Application Closing Date
9th March, 2026.