Key Questions
Do you have hands?on experience supporting construction delivery within a highly regulated environment—specifically managing design documents, configuration control, TQs, and providing technical site support?
Do you hold the required Sellafield site competencies (FGMSP, PFSP, C3, respirator/PVC) and have proven mechanical/plant knowledge suitable for overseeing installation, quality, and constructability reviews?
Are you looking for a role where your technical expertise, and on-site problem solving skills directly influence safe, compliant, and successful delivery within one of the UK’s most complex engineering environments?
Due to an increase in workload, the client requires an experienced Mechanical Site Engineer to strengthen site-based engineering support and ensure robust technical oversight throughout the construction and installation phases. The role will be site facing and support the Construction Delivery Team on various projects, reporting to the Lead Site Engineer. Working for a respected client operating at the forefront of UK nuclear decommissioning and infrastructure delivery, you will play a key role in bridging the gap between design and site execution—providing LFE, validating plant constraints, managing configuration control, resolving technical queries, and ensuring build quality is delivered to exacting standards. This role offers variety, autonomy, and the chance to work across complex mechanical installations using tools such as AutoCAD, Navisworks and 3D scanning, while benefiting from strong contractor support, ongoing technical development and long?term career prospects within a highly specialised environment.
Your duties and responsibilities:
Provide LFE and Knowledge of plant constraints throughout the delivery process.
Pre-approve TQ’s to allow site works to continue.
Produce NFR/Feasibility justifying design decision.
Offer technical advice on the construction site for subcontractors, craftspeople and operatives, as well as feeding information back to the design team.
Manage the site and parts of construction projects.
Rad capability (Ferrus Scanning & Pull Testing) – Not Essential
Assist in sign off against the construction order.
Oversee building work and ensuring the quality of the work.
Setting out, levelling and surveying the site.
Ensure plans, drawings and quantities are accurate for calculations.
Manage the design documents (drawings / specs) supplied by the client and ensure they are met and installed correctly on site.
Manage the configuration control of engineering deliverables and site works.
Liaise with SL designers to ensure compliance with design & construction regulations.
Report progress and other updates back to the client.
Plan the work efficiently and adapt to any setbacks or difficulties.
Proficient use of AutoCAD, Navisworks & 3D scanning software to enable transfer of data from site to the design team.
Provide input and site-based knowledge for Design and Constructability Reviews.
You will have the following qualifications & experience:
HNC/HND Mech
Plant knowledge
FGMSP inducted
PFSP Inducted
C3 trained
Respirator & PVC trained
Sufficient use of CIMAGE on SL SystemThe setting for the role
The role will be site-based. A safety induction will be provided.
Millbank Holdings Ltd is an equal opportunities employer committed to creating an inclusive and diverse workforce. We welcome applications from all suitably qualified individuals, regardless of background, and encourage candidates from underrepresented groups to apply.
We are proud to be a member of the Disability Confident Scheme, and we are committed to ensuring an accessible and supportive recruitment process for everyone. If you require any adjustments at any stage, please let us know and we’ll do our best to accommodate.
Millbank operates as both an Employment Agency and an Employment Business