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Systems Design Engineer ( System Performance )

World Class Defence Organisation is currently looking to recruit a Systems Design Engineer (System Performance) on an initial 6 month contract.    Candidates from a background of working as a Systems Design Engineer OR…

Inside IR35 Hybrid Engineering
Pay rate £75/hour
Contract type Contract
Posted 22 July 2026

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About this contract

Overtime Rate

World Class Defence Organisation is currently looking to recruit a Systems Design Engineer (System Performance) on an initial 6 month contract. 
 
Candidates from a background of working as a Systems Design Engineer OR Simulation and Modelling Engineer OR Algorithm Engineer with experience of Matlab / Simulink would be great.
 
Rate: £75.00 per hour
Location: Stevenage
Hybrid / Remote working: 4 days per week onsite.
Contract: 37 Hours per week
Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’
Duration: 6 Months (initially and then ongoing and long-term thereafter)
IR35 status: Inside IR35 (Umbrella)
 
Job Description:
As one of two System Design Functions in Missile Architecture and Validation UK, System Design Missiles (SDM) is focused on providing Systems Engineering skills to Missile Systems programmes. As such we provide systems engineering skills to the project teams to establish requirements, system architectures and to guide the Verification & Validation process leading to product certification and acceptance by the Customer and their assurance agencies. As part of the system level assurance role we provide system level performance, security and safety assurance.
 
System Performance Engineers are required within one of our systems engineering teams. You will provide performance prediction and analysis expertise to major defence programmes, developing the latest Complex Weapons capabilities for the UK Armed Forces in response to advanced threats in all domains (Air, Land, Sea).

Responsibilities:

You will join a Systems design team on one of the missile programmes. Responsibilities vary depending on the lifecycle stage of any given programme, but will typically include:

Assessment of system performance using complex mathematical models (e.g. 6-Degree-of-Freedom (6-DoF) model):
Developing a good understanding of how the wider system affects performance and the knock-on impacts of changes to the design
For example, assessing the impact of algorithm, subsystem, or physical property changes on the safe release envelope or performance envelope of the system, against a defined set of requirements
Assessments at all phases of the lifecycle:
informing requirements at system and subsystem level
assessing against the requirements throughout concept, assessment and demonstration phases in support of product review gates
support to pre- and post- firing trial planning and analysis (supporting development and /or system verification)
production of final verification evidence (e.g. Performance Statement) for the customer at the completion of development
in-service-support and product evolution assessments
Generation of Missile / Weapon performance boundary data for hosting in launch platform / system (i.e. LAR / WEZ / Range Ring data) via large scale modelling studies and mass data processing 
Skillset/experience required:

Use of mathematical models to assess behaviour of dynamic systems
Data analysis using Matlab and Simulink (or similar)
Capturing and presenting technical data in a clear and concise for expert and non-expert audiences
Exposure to the physical principles of aerodynamics, propulsion, guidance and control, and RF or IR seeker technology
Systems engineering experience in system performance and the functional chain domain
Systems engineering experience at multiple phases of the lifecycle such as requirements, system architecture, verification and certification.
Possession of excellent analytical and problem-solving skills and the capability to write clear, concise engineering documentation
Good verbal communication, listening and time management skills
Ability to engage with subject matter experts and grow your knowledge of new technical areas

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