HVAC Design Engineer - Nuclear

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

As a HVAC Engineer , you will join Bristol team to support our activities within the N uclear Sector sector.

You will support the technical delivery of HVAC system design solutions that provide tempered and conditioned air to Reactor Island facilities , alongside systems that safely extract and treat contaminated air prior to atmospheric discharge. You will contribute across concept and detailed design phases, ensuring that ventilation and cooling solutions meet nuclear safety, performance, and legislative requirements.

You will work closely with system leads and multi-disciplinary engineering teams to deliver integrated HVAC and chilled water solutions for safety-critical nuclear environments.

Location: Bristol

Clearance: BPSS

Experience Level: 3- 10 YOE

Key Responsibilities:

Support delivery of HVAC system design solutions for nuclear facilities

Produce and check technical deliverables for nuclear ventilation and air conditioning systems

Develop systems providing particulate abatement prior to discharge to atmosphere

Design air conditioning and cooling systems for temperature-controlled environments

Collaborate with cross-disciplinary teams to ensure system integration and performance

Produce HVAC design deliverables through Concept and Detailed Design phases

Generate technical reports, calculations, and drawings supporting system design

Act as an HVAC subject matter expert during supplier and stakeholder engagement

Present design maturity and technical solutions at design reviews

Required Skills:

Knowledge of systems engineering principles applied to HVAC systems

Experience developing HVAC designs from concept through detailed definition

Ability to perform trade-off studies to achieve optimal design solutions

Experience writing and checking HVAC technical documentation

Strong collaboration skills across multi-disciplinary engineering teams

Ability to plan work, manage time, and escalate technical risks appropriately

Required Qualifications:

A Bachelor’s or Master’s degree in Engineering , or equivalent military experience .

Desirable Skills:

Experience in nuclear or other safety-critical industries

Familiarity with verification and validation techniques

Experience working within regulated engineering environments

Why join us?

We bring together entrepreneurial, tech-driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

In short you get:

A personalised career path and a rewarding management style

A huge diversity of engineering projects and industries

Private Medical Insurance

Cycle & Tech Scheme

Employee assistance programme

Life insurance & Pension Scheme

Social atmosphere, regular gatherings & team buildings

Flexible way of working (role dependent)

We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military spouses/partners. We recognise the value of military skills and experience and are committed to ensuring that no applicant is unfairly disadvantaged during our recruitment and selection processes.

ALTEN is committed to fostering a diverse and inclusive workplace and values the strength that comes from a global mix of backgrounds and perspectives. We welcome applications from all suitably qualified candidates, regardless of background or protected characteristics under the Equality Act 2010. If you require any reasonable adjustments during the recruitment process, please let us know.

This role may require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website Gov.UK. If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected . Details of this will be discussed with you at interview.