Systems Engineer- Stevenage Onsite - 85 per hour ( 630 per day) Inside IR35 - 12 Month Contract (Extension Likely) We are currently recruiting for an experienced Systems Performance Modelling Engineer to join a major UK engineering and defence programme. This is an excellent opportunity to work on complex, mission-critical systems where modelling and simulation play a key role in shaping future capabilities. Working within a multidisciplinary engineering team, you will be responsible for developing, analysing and enhancing system performance models, supporting technical decision-making across the product lifecycle.Key ResponsibilitiesDevelop and maintain performance models using MATLAB and SimulinkConduct system-level modelling, simulation and analysis activitiesAnalyse system behaviour and performance against customer requirementsSupport design reviews and provide evidence-based recommendationsWork closely with systems, software and hardware engineering teamsProduce technical reports and present findings to stakeholdersSupport verification, validation and acceptance activitiesContribute to the development of modelling techniques and engineering best practiceEssential ExperienceExperience developing models using MATLAB and SimulinkBackground in systems engineering, modelling, simulation or performance analysisStrong problem-solving and analytical skillsAbility to work within a highly regulated engineering environmentIf you don''t tick every box, we would still like to hear ..... full job details .....