Principal/Senior Mechanical Engineer

Millbank Holdings; Glasgow; On-site; GBP 100,000 - 125,000; Full time

Job summary

A leading engineering consultancy in Glasgow is seeking Senior and Principal Mechanical Engineers to lead the design of HVAC and water systems for nuclear facilities. Candidates must have a strong mechanical design background, particularly in compliance with UK building codes. The role is part of a major long-term nuclear infrastructure programme supporting the Royal Navy. Excellent opportunities for career growth and professional development are available.

Qualifications

• Strong background in mechanical building services design, particularly HVAC and water systems.
• Experience producing flow calculations and technical documentation aligned with regulatory codes.
• Familiarity with nuclear safety cases and environmental control requirements.

Responsibilities

• Lead the design and delivery of mechanical building services including HVAC, water, drainage, and fire protection systems.
• Oversee technical documentation, calculations, schematics, and CAD/Revit modelling.
• Ensure compliance with UK building codes and nuclear-specific standards.
• Collaborate with multidisciplinary teams to integrate mechanical systems.
• Mentor junior engineers throughout the project lifecycle.

Skills

HVAC design

Mechanical systems design

Team leadership

Regulatory compliance knowledge

Job description

Overview

Can you lead mechanical building services design for one of the UK's most critical defence infrastructure programmes? Do you have the technical depth to design HVAC and water systems for nuclear facilities—and the leadership to guide others through it? Are you a sole British national with the clearance eligibility to work on high-security MOD projects?

Opportunity

A leading engineering consultancy is seeking both Senior and Principal Mechanical Engineers to join a long-term nuclear infrastructure programme supporting the Royal Navy. Based in Glasgow, this role is part of a major joint venture delivering specialist technical services under the NTSP framework.

Industries

• Defence
• Oil & Gas
• Pharmaceutical
• Aerospace
• High-Security Government Infrastructure

Roles

• Senior Mechanical Engineer
• Principal Mechanical Engineer
• Building Services Engineer
• HVAC Design Engineer
• Mechanical Systems Engineer
• Nuclear Facilities Engineer
• Fire Protection Engineer
• Drainage Design Engineer
• Technical Lead Engineer
• Infrastructure Design Engineer

Responsibilities

• Lead the design and delivery of mechanical building services including HVAC, water, drainage, and fire protection systems for nuclear facilities.
• Oversee technical documentation, calculations, schematics, and CAD/Revit modelling to ensure design integrity.
• Ensure compliance with UK building codes and nuclear-specific standards, including CIBSE, BS EN, and ASHRAE.
• Collaborate with multidisciplinary teams to integrate mechanical systems with structural, electrical, and safety engineering.
• Mentor junior engineers and support stakeholder engagement throughout the project lifecycle.

Qualifications and experience

• Strong background in mechanical building services design, particularly HVAC and water systems.
• Experience producing flow calculations and technical documentation aligned with regulatory codes.
• Familiarity with nuclear safety cases and environmental control requirements.
• Ability to lead design teams and coordinate across disciplines in complex infrastructure projects.

How to apply

If you\'re seeking a new opportunity and think you have the skills and experience we are looking for, then apply now or contact Chris Hill.

Equality and inclusion

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