Maintenance and Substantiation Engineer - Electrical

Job Title: Maintenance Substantiation Engineer - Electrical

Location: Plymouth, Devon

Compensation: £43,935 - £49,104 depending on experience + Benefits

Role Type: Full time / Permanent

At Babcock we’re working to create a safe and secure world, together, and if you join us, you can play your part as a Maintenance Substantiation Engineer at our Devonport Royal Dockyard site.

As a Maintenance Substantiation Engineer you’ll play a unique role in our Devonport Engineering Technical Authority team, supporting the Royal Navy’s submarine refit programme. Day-to-day you’ll provide engineering support and maintenance documentation for a wide range of electrical assets across nuclear licensed sites, MOD authorised sites, and non‑nuclear areas. This is a unique opportunity to contribute to national defence, develop technical expertise, and grow your career in a highly specialised environment.

The role is full‑time (35 hours per week) and offers hybrid working arrangements.

• Producing and amending maintenance documentation for electrical assets across nuclear and non‑nuclear sites.
• Interpreting drawings, manuals and safety reports to ensure compliance with statutory legislation and design standards.
• Delivering documentation aligned with licence conditions and nuclear safety cases.
• Collaborating with engineering and safety teams to meet project goals.
• Occasionally working in radio logically controlled areas, at height or in confined spaces (training provided).
• Producing and updating maintenance documentation for electrical assets using technical drawings and manufacturer manuals.
• Developing maintenance regimes for a wide range of assets across the site.
• Collaborating with technical authority engineering teams to provide guidance and support.
• Interacting with on‑site maintainers and internal stakeholders to ensure compliance and safety.
• Responding to safety reporting by amending documentation as required.

• Proven background in electrical engineering, ideally with maintenance experience.
• Experience in HV/LV systems or control and instrumentation environments.
• Understanding of nuclear safety case substantiation (training provided).
• Ability to work within regulated environments and meet compliance standards.
• Electrical test and inspection expertise.
• Background in EC&I, HV/LV systems or fire alarm systems.
• Ability to interpret technical drawings and documentation.
• Understanding of electrical legislation.
• Commissioning engineering experience (desirable).

• Higher National Certificate (HNC) in a relevant engineering discipline preferred or Level 4 qualification.
• Candidates with strong field experience and willingness to work toward an HNC will be considered;
  Level 3 considered if committed to achieving Level 4 with relevant experience.

The successful candidate must be a sole UK national able to achieve and maintain Naval Nuclear Propulsion Information (NNPPI) security clearance for this role.

Many positions are subject to national security clearance and trade control restrictions. Eligibility may be affected by place of birth, nationality, citizenship and residency. Further details available at

• Generous holiday allowance
• Matched contribution pension scheme with life assurance
• Access to a Digital GP, annual health check and nutritional consultations through Aviva Digi Care+
• Employee share scheme
• Employee shopping savings portal
• Payment of professional fees
• Reservists in the armed forces receive 10 days special paid leave
• Holiday trading allows employees to buy additional leave or sell up to one working week of annual leave from their entitlement (window opens February to March annually)
• ‘Be Kind Day’ lets employees take one working day paid leave per year to volunteer with a chosen charity
• Excellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing

For over a century Babcock has helped to defend nations, protect communities and build a better world. To continue we must adapt, advance and be a sustainable business with a shared goal.

We are a disability‑confident committed employer. If you have a disability or need reasonable adjustments during application or selection, email car with subject ‘Reasonable adjustments requirement’. We’re committed to an inclusive culture where everyone can thrive and we welcome flexible working arrangements – ask about alternatives at interview.

Closing date: 05/01/2026