Senior Systems Engineer (DOORS Next)

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation. Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today. Join us and start building tomorrow’s world today! We are seeking a Senior Requirements Systems Engineer to support a major defence programme, playing a key role in the management, development, and governance of system requirements. You will work closely with multidisciplinary engineering teams and stakeholders, ensuring requirements are effectively captured, maintained, and managed throughout the engineering lifecycle. This position is ideally suited to an experienced Systems Engineer with strong DOORS Next expertise who can provide guidance, best practice, and support for requirements management activities within a complex engineering environment. Location: Portsmouth On-site Requirement: Hybrid (3 days onsite) Seniority: Senior Security Clearance: Candidates must be willing and eligible to obtain SC clearance. Key Responsibilities & Exper