> Markdown version of [/jobs/ext/4016669-weapon-system-architect-ias](https://www.wearedevelopers.com/jobs/ext/4016669-weapon-system-architect-ias). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Weapon System Architect (IAS)

- **Company:** Thales Group
- **Location:** Belfast, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Systems Engineering, Software Requirements Analysis, Systems Modeling Language, Systems Architecture, UML, SC Clearance
- **Published:** October 30, 2026
- **Apply:** https://www.nijobfinder.co.uk/external-redirect-registration?JobId=2057244&LinkSource=JobDetails

## About the Role

* Ability to work with state-of-the-art leading edge technology
 * Developing solutions to complex problems on cutting edge defence equipment to deliver enhanced capabilities
 * Working with a highly skilled, dynamic and forward-thinking team
 * A growing business with great career opportunities, * Acquired degree-level qualification in a scientific, engineering or numerate discipline (or equivalent experience), with the ability to obtain and maintain UK SC clearance
 * Demonstrated systems engineering expertise across the full lifecycle, including requirements capture, system architecture, design, integration, testing and verification of complex systems
 * Proven ability to define, manage and decompose requirements into robust system specifications, architectures, interfaces and behaviours using structured engineering methodologies
 * Demonstrated analytical, critical-thinking and problem-solving capabilities, with a track record of making sound decisions and delivering results in complex environments
 * Proven communication and stakeholder management skills, with the ability to influence, collaborate and communicate complex technical concepts to diverse audiences
 * Acquired knowledge of systems modelling (e.g. UML, SysML), defence architectures, standards and interface protocols, alongside an understanding of relevant safety, security, environmental and regulatory requirements

Desirable

 * Acquired knowledge of Air Defence systems, technologies and their operational application
 * Demonstrated ability to perform effectively within multidisciplinary teams, delivering results in pressured and time-sensitive environments
 * Achieved Chartered Engineer status, or demonstrated commitment to working towards professional accreditation

Ready to apply your systems engineering expertise to cutting-edge Air Defence and Fire Control solutions? Join Thales and help design, develop and deliver the next generation of mission-critical defence capabilities.

## Description

As a Senior System Engineer, you will be designing state-of-the-art Fire Control and Air Defence Systems that deliver world-class performance to meet our customer's needs. Working within an agile multi-discipline team, responsibilities cover the whole product lifecycle from requirements capture and analysis, evaluating new technologies through to defining the system architecture and behaviour, optimising the design and onto building, testing and verifying that the solution meets the customer's requirements.

We are interested to talk to capable candidates from many backgrounds to understand what you can bring to the role. We have recently employed mechanical, electrical and software engineers, as well as physicists and others with prior systems engineering experience. A core capability of a Thales Systems Engineer is the ability to understand the full engineering landscape and different backgrounds can complement this in generating understanding from complexity.

Building a Future, we can all trust.

Thales Integrated Airspace-protection Systems (IAS) UK designs and manufactures a range of cutting-edge technologies ranging from air surveillance and mission planning systems to missile and space propulsion systems. With sites in Belfast, Templecombe and Thorney Island the company specialises in air defence effectors and their integration with weapon systems into various platforms along with the systems to manage and exploit critical mission planning and air surveillance data., * Capture and translate customer, user and business needs into clear system requirements, use cases and functional definitions

 * Define and develop system architecture, interfaces, behaviours and flow-down requirements, working closely with technical specialists to optimise performance
 * Assess user deployment scenarios and evaluate candidate technologies, including emerging and novel solutions, to inform system design decisions
 * Drive system design maturity through trade studies, analysis, prototyping, integration support and complex fault diagnosis
 * Lead verification and compliance activities, ensuring requirements are met, while maintaining design documentation and mentoring junior team members