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Field Service Engineer

Thales

Devonport permanent

Posted: March 19, 2026

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Quick Summary

We're looking for a Field Service Engineer to join our team in Devonport, UK. As a Field Service Engineer, you'll be responsible for operating and maintaining Thales' defense systems in the UK, working closely with our customers to ensure seamless delivery of our mission-critical solutions.

Job Description

Location: Devonport, United Kingdom

Thales people provide armed forces customers with operational advantage at every decisive moment throughout the mission. Defence and armed forces customers rely on us to deliver the full range of defence mission systems solutions at land, sea, and air. Our platforms extend across the battlespace including Above and Sonar, Electronic Combat, and Intelligence, Surveillance and Reconnaissance systems.

Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer. We innovate across the major industries of Aerospace, Defence, Security and Space. Your health and well-being matters to us and that’s why we offer you the flexibility to do what’s important to you; whether that’s part time hours, job sharing, home working, or the ability to flex your start and finish times. Where possible, we support a working pattern that suits your lifestyle and helps you reach your ambitions.

Field Services Engineer

Based at HMNB Devonport, the primary purpose of the Field Services Engineer is to provide technical support and assistance to the Royal Navy sonar systems. This assistance may be purely advisory, a full maintenance activity or a mixture of both.

Though primarily based at Devonport, there will be a need to travel to other RN bases across the UK, occasionally overseas, and occasional requirements to go to sea to provide support for our customer. The role is contracted for Monday to Friday business working hours, but there will often be a requirement to support outside of these hours, either in the evening or at weekends. We also envisage travel away from base approximately 30% of the time.

Key tasks and accountabilities

• Maintain availability of RN sonar systems in line with contractual KPIs
• Co-ordinate on-base technical investigations, liaising with external agencies and other Operating Bases as required.
• Assist users to achieve the highest possible reliability and performance from the system/equipment.
• Assist, when requested, with fault diagnosis to the appropriate level employing BITE, computer software confidence checks and support equipment
• Work with the User/Maintainer to minimise wrong diagnosis and needless return of equipment/LRUs, and provide coaching as required on TUK systems
• Work with or as the maintainer to ensure a high standard of incident/fault data is provided/recorded.
• Where required, enter incident/fault data into the maintenance management system.
• Provide assistance to local repair and/or System Contractor partners.
• Generate reports as required by the Project.
• Represent Thales and the allocated Project with the Customer/User community.
• Respond to technical queries, acting as a single point of contact for the User community.
• Log technical queries on the appropriate maintenance management system as required.
• Act as a two-way conduit of information between the User/Customer and Thales.
• Advise progress on all ongoing tasked activities to the Field Services Manager
• Carry out technical evaluations of new instructions, publications and procedures, including tracking and recording L3 and L4 maintenance
• To ensure that any product safety requirements are not compromised by work carried out and that all safety procedures are adhered to.
• Adhere to relevant company, Health and Safety procedures and maintain vigilance within the workplace to ensure that the working environment remains safe at all times.
• Be flexible so not to compromise the customers training diary.
• Generate weekly status reports of site availability, faults, stores, maintenance and other important site issues.
• To be able to work within confined spaces. 

Technical & Professional Skills

• Strong technical background, with hands-on experience of sonar systems and mechanical/hydraulic systems
• It would be desirable if the candidate has previous experience working with 2087 and 2076 sonar systems

Education & Qualifications

• Demonstrable engineering qualifications, up to a minimum HNC level, or demonstrable equivalent experience

This role requires a flexible approach to your place of work, with the successful candidate expected to be travelling approximately 40% of their time in support of the RN

Connect with Fiona Tal, Talent Acquisition Partner #LI-FT1 who is eager to explore together with you this exciting opportunity.

This role will require SC Clearance. It would be advantageous if currently held, however, if not currently held, it is a requirement that the successful applicant will undergo, achieve, and maintain SC Clearance. Please visit the UKSV website for further guidance.

To be eligible for full SC, you generally need to have resided in the UK for the last 5 years. In some circumstances, a minimum of 3 years’ residence in the UK over the last 5 years may be accepted, with additional overseas checks.

In line with Thales' Baseline Security requirements, candidates will be asked to provide evidence of identity, eligibility to work in the UK and employment and/or education history for up to three years. Some vacancies may require full Security Clearance which can require further evidence to be provided. For further details of the evidence required to apply for Baseline and Security Clearance please refer to the Defence Business Services National Security Vetting (DBS NSV) Agency.

At Thales we provide CAREERS and not only jobs. With Thales employing 80,000 employees in 68 countries our mobility policy enables thousands of employees each year to develop their careers at home and abroad, in their existing areas of expertise or by branching out into new fields. Together we believe that embracing flexibility is a smarter way of working.

Thales UK is committed to providing an inclusive and barrier-free recruitment process. We will provide reasonable adjustments and support to ensure neuro-diverse applicants or those with a disability or long-term condition can be their best during the recruitment process. To request an adjustment, if you need this job advert in an alternative format or if you have any questions about the recruitment process, please contact Resourcing Ops for mid to senior roles, or the Early Careers Team for graduate and apprentice roles.

Great journeys start here, apply now!

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