Senior Building Services Engineer (Mechanical)

Company: Assystem
Apply for the Senior Building Services Engineer (Mechanical)
Location: Bristol
Job Description:

Overview

In this role you will help deliver the nuclear-focused Building Services design for the Hinkley Point EPR project within the Ancillary Works Team. You will oversee MEP design quality from external consultants and contractors, ensuring compliance with NNB requirements across concept to construction. You will coordinate interfaces, support design reviews, and assist commissioning readiness. This is a chance to contribute to a flagship nuclear program with a collaborative, details-driven team.

Pay / Benefits

  • Hybrid Working – Flexibility to work from home and the office
  • 25 Days Annual Leave + Bank Holidays
  • 8% Company Pension Contributions
  • Income Protection & 3x Salary Death-in-Service Cover
  • Healthcare Cash Plan – Claim back on dental, optical & more
  • Cycle to Work Scheme – Save money & go green

Responsibilities

  • Support the preparation of technical specifications for consultants and contractors
  • Contribute to bidders’ technical assessment
  • Liaise with stakeholders across specification, procurement, design, construction, use, maintenance and decommissioning of building services
  • Surveil subcontracted design activities with external consultants
  • Assist design reviews as part of staged delivery
  • Analyze and resolve technical design issues raised by consultants/contractors
  • Support management of design changes and non-conformances
  • Support construction, installation and commissioning of building services
  • Assist in assessing proposed changes during construction and ensure commissioning proposals meet requirements
  • Coordinate with NNB Commissioning teams and align with NNB requirements for commissioning sequences
  • Apply QA processes and manage design activities per NNB arrangements
  • Raise alerts to building leads when necessary
  • Provide expert project support through engagement with Procurement, Design Authority, Engineering, MEH and Commissioning
  • Serve as the point of contact for NNB Commissioning-related topics

Key requirements

  • Mechanical or Electrical Engineering degree
  • Experience in project coordination and design management
  • Experience in Nuclear or other highly regulated industries
  • Knowledge of building regulations
  • Knowledge of data centres is desirable
  • Accuracy, tenacity, diplomacy, results-oriented leadership
  • Strong organizational skills and attention to detail
  • Ability to work independently and be proactive
  • Excellent communication/interpersonal skills and teamwork
  • Discretion and ability to handle sensitive information
  • Fluent in English; French desirable
  • accuracy
  • tenacity
  • diplomacy
  • design management
  • stakeholder liaison
  • QA processes

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Posted: October 17th, 2026