Senior Design Engineer

Job Title: Senior Mechanical Design EngineerLocation: Plymouth, Devon + Hybrid Working ArrangementsCompensation: 44,600

Below covers everything you need to know about what this opportunity entails, as well as what is expected from applicants.
- 55,800 Depending on Experience + BenefitsRole Type: Full time / Permanent Role ID: SF73716Help design the future of submarine infrastructure and national defenceAt Babcock we're working to create a safe and secure world, together, and if you join us, you can play your part as a Senior Mechanical Design Engineer at our Devonport Royal Dockyard site. The roleAs a Senior Mechanical Design Engineer, you'll play a pivotal role in delivering complex mechanical system designs that directly support the United Kingdom's submarine fleet.

From fluid systems and industrial gases to large-scale pipework infrastructure, your work will contribute to critical defence programmes with a clear, visible impact. Day-to-day, you'll have the unique opportunity to be involved in the full engineering lifecycle—from concept design through to implementation, maintenance, and eventual decommissioning.

You'll lead technical activities, provide expert engineering guidance, and ensure compliance with rigorous safety and regulatory standards in a highly regulated environment. Working on major programmes across Devonport, you'll see your designs come to life on-site while developing your career across diverse, technically challenging projects.

Leading the development and delivery of mechanical designs across the full project lifecycleProviding expert advice on mechanical systems, compliance, and engineering standardsConducting site visits, surveys and supporting through-life system performanceManaging and supporting engineers, coordinating work and driving technical progressProducing and reviewing design, safety and substantiation documentationThis role is full time, 35 hours per week and provides hybrid working arrangements with a minimum of 2 days in the office/onsite.

Essential experience of the Senior Mechanical Design Engineer Demonstrating strong mechanical engineering experience across design, operation or maintenance of fluid or pipework systemsApplying the full engineering design lifecycle within complex projectsWorking within regulated industries such as defence, nuclear, utilities or similarUnderstanding fluid mechanics principles including water systems, valves and pipelinesCollaborating with multidisciplinary teams and stakeholders to deliver engineering solutionsQualifications for the Senior Mechanical Design Engineer Level 6 qualification in a mechanical engineering discipline, or Level 5 with significant relevant experience (essential)Professionally registered with a recognised engineering institution such as the Institution of Mechanical Engineers or Institution of Engineering and Technology
- DesirableSecurity ClearanceThe successful candidate must be a sole UK National who is able to achieve and maintain Security Check (SC) security clearance for this role.

Many of the positions within our company are subject to national security clearance and Trade Control restrictions.

This means that your eligibility for certain roles may be affected by your place of birth, nationality, current or former citizenship, and any residency you hold or have held.

Further details are available at United Kingdom Security Vetting: clearance levels
- GOV.UK ( ).What we offer Generous holiday allowanceMatched contribution pension scheme, with life assuranceAccess to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+Employee share schemeEmployee shopping savings portalPayment of Professional FeesReservists in the armed forces receive 10-days special paid leaveHoliday Trading is a benefit that allows UK Babcock employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement.

There is an annual Window to request this benefit.

'Be Kind Day' enables employees to take one working day's paid leave a year (or equivalent hours) to undertake volunteering work with their chosen organisation or registered charityExcellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing. BabcockWe're Babcock — a global FTSE 100 organisation with over 26,000 people working together to make a difference. Here, you'll be part of something bigger.

From initial design to final decommissioning, your work will contribute to products and services that are essential to national security and public infrastructure.

Together, we're building a future that lasts — not just through the impact we make, but through meaningful careers that respect your work-life balance. We call that lifetime engineering. Join us and see how far we can go, together. We are a disability confident committed employer.

If you have a disability or need any reasonable adjustments during the application and selection stages, please with the subject header 'Reasonable adjustments requirement'.

We're committed to building an inclusive culture where everyone's free to thrive. xohmjla

We are happy to talk about flexible working – please ask about alternative patterns of work at interview. Closing date:09/10/2026#BABDESTNUC