We are seeking an experienced Performance Engineer to join a Diesel Performance, Emissions and Validation team within a Product Engineering environment based in Stafford. This is a 12-month contract role offering the opportunity to work on both current production engines and new product introduction programmes. Performance Engineer (Diesel Performance and Emissions) Location: StaffordRate: £50.00 - £51.31 per hourContract: 12-month contract (Inside IR35) The Opportunity We are seeking an experienced Performance Engineer to join a Diesel Performance, Emissions and Validation team within a Product Engineering environment based in Stafford. This is a 12-month contract role offering the opportunity to work on both current production engines and new product introduction programmes. You will be responsible for delivering engineering activities that develop engines to meet performance and emissions targets, supported by structured test work. The role has direct impact on product performance, compliance, and overall market desirability. Key Responsibilities Translate product-level objectives into clear technical objectivesDevelop and execute test methodologies to evaluate technical performanceContribute to Failure Mode and Effects Analysis (FMEA) during concept reviewsCreate and report Design Verification Plans (DVPs)Lead diesel engine performance and emissions development activitiesSpecify, calibrate and verify software featuresCreate and optimise engine calibrationsConduct mecha