Project Snapshot
Client: European transmission system operator (TSO)
Location: Ile-de-France, France (La Defense, Paris)
Duration: 6 months (approx. 110 man-days), renewable
Starting date: 13 July 2026
Work mode: Office at client site
Languages : English and French fully proficient (both mandatory).
Description
Our client is a confidential European electricity transmission system operator responsible for connecting offshore wind farms to the onshore grid. Its offshore infrastructure division leads the engineering, construction and commissioning of complete grid connection systems: offshore substations, subsea and underground export cables, and onshore substations. The current project connects a 600 MW offshore wind farm in northern France and involves an established multidisciplinary project organisation working alongside the wind farm producer and major EPCI contractors.
Project scope
The grid connection comprises one offshore substation stepping up the wind farm output from 66 kV to 225 kV, approximately 24 km of double-circuit 225 kV link (17 km subsea and 6.5 km underground, with two transition joint chambers at landfall), an onshore substation in the port industrial zone and a short overhead line connection to the existing network. The Interface Engineer implements the interface management process between the wind farm producer, the client and its contractors, principally the offshore substation EPCI contractor and the export cables contractor.
The assignment is office-based at La Defense within an established project team, from July 2026 for six months, renewable in line with project progress. The position may evolve with project workload and phasing.
Role overview
To own and operate the interface management process across all packages of the grid connection, coordinating the producer, contractors and the client's project organisation so that physical and technical interfaces are resolved on time and the client's contractual exposure is minimised.
Reporting line: You work under the Interface Manager for your perimeter and the project's Engineering Manager, in interaction with package managers, engineering leads, contract managers, planners, doc controllers and construction and commissioning leads.
Required Qualification
Key responsibilities
Interface process management
• Implement and steer the interface management process across all packages, in line with the project responsibility matrix.
• Manage interface registers and interface sheets, tracking progress and all interface modifications and evolutions.
• Resolve residual inconsistencies and handle clarification requests on technical interfaces.
Contractual compliance
• Safeguard contractual interface processes, including the EPCI contract and the connection agreement, to minimise the client's contractual exposure.
• Track and escalate any contractor or producer deviation to package managers and contract managers.
Stakeholder coordination
• Act as the single point of contact for contractors and the wind farm producer on technical interface management.
• Lead interface meetings with contractors and the producer, and contribute to package progress reviews.
• Maintain clear communication and information flow between all project actors.
Planning, data and reporting
• Track the delivery of input and output data and package deliverables with package managers and doc controllers.
• Maintain interface milestones in the project schedule and ensure interface data is reflected in studies, databases and procedures.
• Monitor free issued items and contribute to progress reporting on the interface management perimeter.
Key deliverables
• Interface responsibility matrices (Interface Scope of Work) established and maintained per package, covering supply limits and yard and offshore activities.
• Interface Management Plan and Interface Basis of Design issued and kept current throughout the assignment.
• Interface register and information-exchange tracker maintained accurately and exhaustively.
• Interface sheets processed within contractual response deadlines.
• Monthly interface reporting delivered, including stakeholder responsibility-limit presentations.
Requirements
Education
• Master's-level engineering degree (Bac+4/5), ideally in electrical or mechanical engineering.
Experience
Must-have:
• Minimum 4 years in an equivalent interface engineering role, with demonstrated hands-on operation of an interface management process.
• Proven experience on large infrastructure projects and engineering of complex systems.
• Strong technical culture in high-voltage substations (HV and LV equipment), offshore platforms or marine works.
• Demonstrated ability to integrate into an established project team and coordinate all project stakeholders.
Nice-to-have:
• Prior experience on offshore wind grid connection or transmission system operator projects.
• Familiarity with EPCI contract interface processes and free issued items management.
Technical skills
• Mastery of interface management tools: responsibility matrices, interface registers, interface sheets and trackers.
• Sound understanding of engineering and design processes for complex multi-package projects.
• Structured reporting and document control practices.
Soft skills
• Strong coordination and facilitation skills across multicultural project stakeholders.
• Negotiation skills and resilience under pressure.
• Sharp synthesis and high-quality written output.
• Communication and listening skills suited to a complex project organisation.
• English and French fully proficient, written and spoken (both mandatory).
Summary
- Freelance
- Based on experience
- Office