Job Description
Who we need: Systems Engineers – Defence & Mission Systems | Belfast
ALTEN UK is establishing a new Defence Systems Engineering capability in Belfast, supporting a portfolio of advanced mission and sensing systems. This is an opportunity to work on high-impact projects, defining and delivering complex system architectures that integrate software, hardware, and test disciplines. You’ll contribute across the full engineering lifecycle — from requirements capture to qualification — as part of a growing multidisciplinary team helping shape the next generation of defence technology.
Location: Belfast
On-site requirement: 3–5 days per week
Clearance: Active SC Clearance preferred / must be eligible (5+ years UK residency)
Seniority: 5+ years’ experience
Key Responsibilities:
* Develop and manage system requirements, ensuring clear traceability and flow-down to subsystem and component levels.
* Support system architecture design, trade studies, and interface control documentation (ICD) development.
* Contribute to Model-Based Systems Engineering (MBSE) using tools such as MATLAB, Simulink, or equivalent modelling environments.
* Plan and execute IVVQ activities, maintaining evidence, tracking defects, and ensuring timely closure with stakeholders.
* Produce and maintain technical documentation including design notes, test plans, procedures, and reports.
* Work collaboratively with hardware, software, and test teams to achieve design maturity and milestone readiness for trials and qualification.
Qualifications
Required Skills:
* Experience in requirements management tools such as IBM DOORS or equivalent.
* Familiarity with systems engineering methodologies, V-model lifecycle, and configuration management.
* Understanding of verification and validation processes, including test planning and evidence collation.
* Strong technical writing and communication skills for design documentation and stakeholder reporting.
* Ability to work across multi-disciplinary teams to integrate HW/SW/test activities effectively.
Desirable Skills:
* Experience with MBSE frameworks (SysML, Simulink, Capella, etc.).
* Knowledge of safety-critical systems or mission systems integration.
* Understanding of risk, issue, and configuration control within large engineering programmes.
* Familiarity with defence or aerospace standards (e.g. DEF-STAN 00-56, DO-178C, ISO 15288).
* Prior experience working in high-integrity environments such as aerospace, defence, or transportation.
Required Qualifications:
* Must be eligible for or already hold UK Security Clearance (SC)
* A Bachelor’s or Master's degree in Systems, Aerospace, Electronics, or Software Engineering, or a related field OR
* A relevant technical military background with equivalent hands-on engineering experience
Additional Information
Why join us?
We foster a community of dually talented individuals who are both entrepreneurs and technology specialists. Our teams embody the spirit of innovation and entrepreneurship, enabling us to develop solutions most efficiently.
Our commitment to sustainable growth is unwavering, and we continuously strive for accelerated transformation and continuous improvement. Through ALTEN labs, mentoring programs, internal universities, and more, we are always pushing boundaries and embracing new possibilities.
We offer incredible opportunities to join inspiring projects in the most innovative companies.
We prioritise your career development with personalised support plans tailored to your own aspirations. We're here to empower you and help you reach your full potential.
Join our passionate team and start building tomorrow, today!
In short you get:
* A personalised career path and a rewarding management style
* A chance to work on the most exciting engineering projects and technologies along with Premium Customers
* A huge diversity of engineering projects and industries
* A competitive salary
* Private Medical Insurance
* Pension Scheme
* Cycle-to-work Scheme among many additional benefits
* Social atmosphere, regular gatherings, and team buildings
* Flexible way of working (role dependent)