About this role
We are seeking a Senior Mechanical Equipment Engineer to support a major nuclear programme based in Oxfordshire. This is a long-term contract opportunity working within an active nuclear environment, supporting detailed design, works testing, and equipment delivery.
Key Responsibilities:
Deliver detailed design and specification of mechanical equipment including pumps, valves, and HVAC systemsProduce and review equipment specifications, datasheets, and technical documentationSupport works testing, installation, and commissioning activitiesLiaise with internal teams, vendors, and stakeholders to ensure equipment meets operational and safety requirementsSupport post-operational activities including equipment associated with cleanout and grit-blasting processesEnsure compliance with nuclear safety standards and project requirements Required Skills:
Experience working as a Mechanical Equipment Engineer in a Senior or Principal capacityStrong detailed design experience within complex engineering environmentsExperience specifying and supporting mechanical equipment such as pumps, valves, and HVAC systemsExperience supporting works testing and equipment verificationAbility to work within highly regulated or safety-critical environmentsRequired Qualifications:
A Bachelor’s or Master’s degree in Engineering, or equivalent military experience.Desirable Skills:
Nuclear industry experience, particularly within active or operational facilitiesExperience supporting decommissioning, maintenance, or post-operational cleanout activitiesFamiliarity with nuclear site procedures and safety requirements 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 industriesPrivate Medical InsuranceCycle & Tech Scheme Employee assistance programmeLife insurance & Pension SchemeSocial atmosphere, regular gatherings & team buildingsFlexible 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.