A leading recruitment firm in the UK is seeking a Principal Systems Engineer to lead complex Test, Trials, Training and Evaluation (T3E) infrastructure projects. This role involves delivering safe and compliant solutions while providing technical leadership across multidisciplinary teams. Candidates should have a strong systems engineering background, relevant degree or equivalent experience, and familiarity with industry standards. The position is based on-site in Salisbury three days a week and requires SC clearance. #J-18808-Ljbffr