Job Description Overview Omnia Projects Ltd is a leading provider of technical integration and project management services to major infrastructure clients. We are seeking a Technical Interface Manager to integrate directly within National Grid’s project organisation, supporting the Sizewell C New Substation build. Key Responsibilities & Deliverables The Integration Project Manager will focus on engineering integration and interface management across multiple Tier 1 contractors, OEMs, designers, and delivery partners. Acting as a client-side integrator, the role provides structured oversight of design and engineering interfaces to ensure alignment of technical deliverables, programme logic, and assurance requirements. The objective is to facilitate a coordinated and buildable design development process, supporting National Grid in maintaining control of cross-discipline dependencies and reducing the risk of late-stage design conflicts, rework, or programme disruption. Key responsibilities: - Use and comply with procedures, business systems and data/asset systems. - Act as client-side Technical Interface Lead within project team, embedding into NG governance and reporting structures. - Identify and manage key engineering interfaces between engineering disciplines and grid connection works. - Facilitate interface workshops and design coordination meetings across supply chain partners. - Review contractor design programmes to verify logic alignment across disciplines and critical-path dependencies. - Support the management of technical queries (TQs), RFIs, and design change processes to ensure timely resolution. - Review the engineering deliverables in view of the NG technical specifications, standards, and stage-gate requirements. - Coordinate the management of design risks and opportunities, ensuring integration with the Project Risk Register. - Provide concise reporting to the Project leadership on interface status, emerging risks, and required interventions. The service is intended to strengthen technical cohesion across the project, ensuring a coordinated, and programme-aligned design prior to transition into construction.