Principal Mechanical Engineer, London

Live Design as the central project type, not a side workstream that gets squeezed when budgets tighten.This is a Principal Mechanical Engineer position with a building services and engineering practice based in central London with the project diversity that location suggests. The day-to-day mix runs HVAC system design, plant strategy, compliance work across Part L and Part F, and the coordination needed to make a mechanical scheme deliverable inside a multi-disciplinary team. Tools you would expect: Revit, Hevacomp or IES, AutoCAD, Bluebeam for coordination.You are operating at principal or associate director level. The remit covers technical leadership of a discipline, project portfolio responsibility, business development input, and visible influence on how the practice grows.Salary: 95,000 to 112,000 depending on experience. Working pattern: on-site, full time, based in central London.Send your CV to Alex Cole at Responsum for a 20-minute call this week.If you’ve read this far and you’re still unsure and would prefer a detailed market insight including salary bands and market trends - then check out our free guide here: https://www.responsumltd.com/uk-salary-guide-2026