Company Description Are you passionate about engineering? Do you want to make a difference? You could be one of our 54k+ colleagues in over 30 countries working on inspiring projects in the most innovative companies. Apply (by clicking the relevant button) after checking through all the related job information below. Join us and start building tomorrows world today! Job Description Are you an experienced Systems Engineer ready to tackle exciting challenges in the defence and marine sectors ? At ALTEN, you'll work on cutting-edge submarine systems , driving innovation and delivering solutions for mission-critical projects. This is your chance to be part of something extraordinary in a dynamic and supportive environment. Key Responsibilities: Deliver full-lifecycle systems engineering , working across the V-Model to develop, test, and validate advanced solutions. Define and manage system requirements , ensuring seamless alignment with project goals and performance criteria. Collaborate on subsystem integration for complex electronics systems in submarine platforms. Troubleshoot and resolve system-level challenges to meet demanding operational standards. Support testing and validation , ensuring systems perform reliably under challenging conditions. Location: Portsmouth , with a hybrid working model . Qualifications 5+ years of experience in systems engineering , particularly in defence or marine industries . Expertise in V-Model development and full lifecycle engineering . Strong understanding of electronics and experience with submarine systems or equivalent technologies. Sole British citizenship with eligibility for security clearance . Excellent communication and teamwork skills, with the ability to thrive in a collaborative environment. Desirable Skills: Knowledge of mission-critical communications and intelligent systems . Experience in sectors such as defence, aerospace , nuclear , or other regulated industries. Familiarity with tools for requirements management and system modelling. Additional Information Why join us? We foster a community of dually talented individuals who are both entrepreneurs and technology specialists. Our teams embody the spirit of innovation and entrepreneurship, enabling us to develop solutions most efficiently. Our commitment to sustainable growth is unwavering, and we continuously strive for accelerated transformation and continuous improvement. Through ALTEN labs, mentoring programs, internal universities, and more, we are always pushing boundaries and embracing new possibilities. We offer incredible opportunities to join inspiring projects in the most innovative companies. We prioritise your career development with personalised support plans tailored to your own aspirations. We're here to empower you and help you reach your full potential. Join our passionate team and start building tomorrow, today! In short you get: A personalised career path and a rewarding management style A chance to work on the most exciting engineering projects and technologies along with Premium Customers A huge diversity of engineering projects and industries A competitive salary Private Medical & Travel Insurance Pension Scheme Cycle-to-work Scheme among many additional benefits Social atmosphere, regular gatherings, and team buildings Flexible way of working (role dependent) JBRP1_UKTJ