Pre-Fabrication Detailing Lead

At Dornan we are currently recruiting for Pre‑Fabrication Detailing Lead based in our London head office SW7.

Reporting to the Prefabrication Manager, this position is based in our London Office. The Pre‑Fabrication Detailing Lead will produce manufacturing drawings for offsite assets including pump skids, multi‑storey risers and combined distribution modules.

• Produce detailed 3D models and manufacturing drawings for offsite modular construction.
• Generate piping isometrics based on P&IDs and relevant material specifications.
• Design efficient plant room equipment layouts to optimise service routing.
• Ensure all proposed designs comply with factory requirements, equipment specifications, logistics considerations, and final installation constraints.
• Issue completed 3D models to project teams for integration into the federated model and review/interrogate designs to identify opportunities for installation efficiency and increased prefabrication.
• Develop templates, standards, methods, and procedures (SMPs) for prefabrication detailing to ensure consistent quality across all deliverables.
• Manage the 3D content library and maintain models in line with technical submittals, incorporating lessons learned and fabrication team feedback into updated SMPs.
• Lead and support a team of detailers, allocating resources and ensuring all work aligns with defined SMPs.
• Monitor workload peaks and coordinate with third‑party partners to ensure deliverables meet programme requirements.
• Track worked hours per asset and compile weekly reports for all team members.
• Liaise with third‑party structural engineers to secure structural approval for issued drawings.
• Manage delivery schedules in alignment with the Contract Programme.
• Develop and maintain the prefabrication programme in collaboration with the Prefab Manager, producing progress reports aligned with the programme, highlighting risks, delays and recommending mitigation measures.
• Raise and clarify queries with the design team through the Request for Information (RFI) process and prepare look‑ahead programmes to support production planning.
• Conduct quality control inspections and snagging during prefabrication and upon delivery of components to site.
• Carry out document control activities, accurately recording and sharing information with the wider project team.
• Produce all necessary engineering documentation to support the overall prefabrication strategy.

• Detailed knowledge of the Pre‑Fabrication Detailing Lead role.
• Detailed knowledge of piping design and spooling requirements.
• Degree or trade qualified in Mechanical / Building Services Engineering or a related HVAC discipline.
• 8‑10 years’ experience in a similar role.
• Advanced knowledge of 3D software including Autodesk AutoCAD, Revit and Fabrication MEP.

We are committed to creating an inclusive environment where people from all backgrounds feel valued and supported. Diversity in thought, culture and experience strengthens our teams and our projects.