Job Description

Location: Belfast, United Kingdom
Thales people architect solutions that are relied upon to deliver operational advantage at every decisive moment throughout the mission. Defence and armed forces customers rely on us to deliver the full range of defensive systems for land, sea, and air. From early warning, to threat neutralisation, our platforms cover all levels from very short-range systems, to extended protection across the entire battle-space including Airspace Mobility Solutions, Vehicles and Tactical Systems and Missile Defence, Optronics, and Radar.
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.

Join Thales Integrated Airspace-protection Systems (IAS) UK - Innovate, Develop, and Protect

Are you ready to work for a world-renowned organisation that is constantly striving to enhance the lives of millions through cutting-edge technology and services? Thales IAS UK offers you the opportunity to be part of a team of leading specialists who are designing future-proof solutions today. Look no further if you seek a challenging and rewarding career that impacts global safety and security.

Why Thales IAS UK?

State-of-the-Art Technology

: Immerse yourself in leading-edge innovations.

Dynamic Team

: Collaborate with highly skilled, forward-thinking professionals.

Career Growth

: Be part of a growing business with exceptional career opportunities.

With locations in Belfast, Templecombe, Crossgar, and Thorney Island, Thales IAS UK specialises in air surveillance, mission planning systems, missile technology, and space propulsion systems. We integrate weapon systems into various platforms while managing and exploiting critical mission planning and air surveillance data.

About the Role - Senior System Engineer

As a Senior System Engineer at Thales IAS UK, you will design world-class Fire Control and Air Defence Systems that meet our customers' needs with impeccable performance. Working within an agile, multi-disciplinary team, your responsibilities will span the entire product lifecycle. From requirements capture and analysis to defining system architecture and optimising designs, you will play a key role in building, testing, and verifying solutions.

Key Responsibilities:

Capture, define, and develop requirements based on customer and business needs. Design systems with customer deployment in mind. Define system architecture, interfaces, behaviour, and flow-down requirements. Collaborate with specialists to inform and refine system design and performance. Optimise design through system trades, analyses, and prototyping. Define and assess verification activities to ensure product compliance. Diagnose complex system faults during integration and testing. Document design decisions and rationale in technical artefacts. Provide coaching and mentoring to team members, sharing knowledge within the wider systems team.

Who We Are Looking For:

You ideally possess a Bachelor's Degree (BEng, BSc) in a Numerate, Scientific, or Engineering discipline, with experience in many of the following areas:

Requirements capture, management, and product specification. Knowledge of defence systems such as C2, Fire Control, Sensors, Effectors. Experience designing systems, interfaces, and behaviours. Ability to design for Non-functional, EMC, Environmental, Eco, Security & Safety requirements. Expertise in designing for relevant Legislative and Regulatory requirements. Familiarity with defence standard requirements and common interface protocols. Proficiency in system design processes, methods, and tools. Knowledge of modelling methods (e.g., SysML) and Defence Architectural Frameworks (e.g., MODAF). Understanding of Systems, Hardware, and Software engineering lifecycles. Excellent analytical skills with the ability to navigate complexity and shape solutions. Exceptional communication skills, capable of articulating complex concepts to both technical and non-technical stakeholders.

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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.


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