Our client, a leader in the Defence and Security sector, is seeking a Principal Software and Hardware Assurance Practitioner to join their team. This is a permanent role offering a hybrid working pattern with locations in Malvern, Farnborough, Bristol or Boscombe Down. As a key contributor to national security programmes, you will impact the future of defence technology by ensuring the safety and performance of complex systems. Key Responsibilities: Leading the assurance of hardware processes in line with CEH Safety Standards (e.g., DO-254, BS EN 61508-02) at the appropriate integrity level.Assessing CEH systems in accordance with High Integrity Software safety standards.Conducting audits and reviews as lead auditor and technical reviewer.Evaluating software and hardware lifecycle artefacts against relevant standards.Mentoring project teams and supporting high-quality technical delivery.Attending customer meetings and workshops across the UK and Europe. Job Requirements: Experience as a technical assessor or strong software/aviation engineering background.Excellent communication skills and a pragmatic, solution-focused mindset.SME-level understanding of high-integrity hardware development (VHDL).Knowledge of hardware chipsets (FPGA, ASIC, PLC).Strong understanding of hardware lifecycles and engineering processes.Experience working with CEH standards (DO-254, EN 61508-2).A relevant technical degree (Computer Science, Maths, Engineering, or equivalent) or extensive technical