Principal Systems Engineer – HALO (Hostile Artillery Locating System) Location: Basildon Clearance Required: SC Cleared. Contract Type: Contract We are recruiting for a Principal Systems Engineer to join a growing team working on the next-generation HALO (Hostile Artillery Locating System) — a cutting-edge, long-range acoustic weapon locating system. HALO is designed to counter the growing threat posed by electronic warfare and anti-radar weapon systems that limit the effectiveness of radar-based solutions. This is a key opportunity to join the team during a critical stage of the engineering lifecycle. You will play a lead role in delivering systems engineering activities from concept through to deployment, collaborating across multidisciplinary teams to drive integration, qualification, and technical delivery. Key Responsibilities: Define, manage, and trace requirements for complex, multi-disciplinary systems. Lead and contribute to system integration, verification, qualification, and validation. Guide and support junior engineers, promoting technical excellence within the team. Ensure engineering outputs are compliant with military and industry standards, as well as regulatory frameworks. Participate in and lead technical design and peer reviews. Support the development and maintenance of a robust software security plan. Skills & Experience Required: Strong knowledge of the full engineering development lifecycle. Proven experience in defining and managing system requirements, and supporting V&V activities. Demonstrated capability in system-level testing and integration. Understanding of CE Marking requirements for electrical and electronic equipment. Proficiency with IBM DOORS for requirements management. Awareness of relevant safety, security, and legislative standards. Background in the defence or related high-integrity engineering sectors. Desirable: Experience in electronics-focused systems roles. Ability to create and deliver training material and user manuals for end-users.