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Senior Principal Engineer United Kingdom Jobs

20 Job Offers

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Senior Principal Eica Engineer - Water / Wastewater
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Senior Principal EICA Engineer sought to lead discipline design on major UK water/wastewater programmes in Bristol. You will provide technical authority, mentor teams, and drive sustainable treatment solutions. Requires 10–12+ years’ UK water sector experience, Chartered status, and proven multid...
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United Kingdom , Bristol
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Egis in the UK
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Senior Principal Eica Engineer - Water / Wastewater
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Senior Principal EICA Engineer sought to lead discipline design on major UK water/wastewater programmes. This senior role demands 10–12+ years’ experience, Chartered status, and deep technical expertise in the regulated water sector. Based in Manchester, you will drive multidisciplinary coordinat...
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United Kingdom , Manchester
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Egis in the UK
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Senior Principal Eica Engineer - Water / Wastewater
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Senior Principal EICA Engineer sought to lead discipline design and technical assurance on complex UK water/wastewater projects. Requires 10–12+ years’ experience, Chartered Engineer status, and deep expertise in the regulated water sector. Based in London with hybrid working, this role offers ac...
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United Kingdom , London
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Egis in the UK
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Civil Engineer - Water / Wastewater (Senior / Principal)
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Lead national water and wastewater infrastructure projects as a Senior/Principal Civil Engineer at Egis in London. Drive major UK programmes like AMP8, leveraging your CEng status and expertise in Civil 3D and hydraulic modelling. This senior role offers hybrid working, accelerated career progres...
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United Kingdom , London
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Egis in the UK
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Mechanical Engineer - Water / Wastewater (Senior / Principal)
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Senior/Principal Mechanical Engineer sought for Egis’s expanding UK Water team in Manchester. Lead municipal water/wastewater treatment design across AMP8 and major programmes. Requires CEng, IMechE membership, and deep UK regulated water market expertise. Benefit from accelerated career progress...
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United Kingdom , Manchester
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Egis in the UK
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Mechanical Engineer - Water / Wastewater (Senior / Principal)
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Lead national mechanical engineering for major UK water/wastewater infrastructure programmes. As Senior/Principal Engineer, you will shape design strategy, guide multidisciplinary teams, and drive best practice. Requires CEng, deep UK regulated water market experience, and treatment design expert...
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United Kingdom , Bristol
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Egis in the UK
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Senior Principal Mechanical Engineer
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Senior Principal Mechanical Engineer sought to lead the Cooling Water Island team for a groundbreaking Small Modular Reactor (SMR) program in Newcastle upon Tyne. Drive FEED to detailed design, ensure regulatory compliance, and manage multidisciplinary teams. Requires Chartered Engineer (CEng) st...
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United Kingdom , Newcastle upon Tyne
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ASSYSTEM
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Senior Principal Mechanical Engineer
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United Kingdom , Derby
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ASSYSTEM
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Senior Principal Mechanical Engineer
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United Kingdom , Bolton
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ASSYSTEM
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Senior Principal Mechanical Engineer
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United Kingdom , Warrington
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ASSYSTEM
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Senior / Principal Civil Water Engineer
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Senior / Principal Civil Water Engineer sought to lead multi-disciplinary teams on landmark UK water infrastructure projects in Bristol. You will drive technical design for hydraulics, wastewater, and clean water systems, mentoring junior engineers. Enjoy flexible hybrid working, a competitive sa...
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United Kingdom , Bristol
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Morson Talent
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Principal AI Software Engineer, Senior Vice President
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Principal AI Software Engineer, SVP role in London. Architect scalable backend systems for advanced AI tools, leveraging expert Python, FastAPI, and Generative AI frameworks like LangChain. Requires deep ML knowledge and full lifecycle ownership. C++ expertise is a bonus. Benefits include 27+ day...
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United Kingdom , London
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Citi
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Process Engineer - Senior / Principal
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United Kingdom , Chorley
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VINCI Energies
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Senior / Principal Mechanical Engineer
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Senior / Principal Mechanical Engineer sought to author critical Design Substantiation Reports for nuclear safety. This client-seconded role demands a questioning attitude, safety case expertise, and a Chartered Engineer status (or equivalent). Join ACTEMIUM Design UK, part of VINCI Energies, in ...
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United Kingdom , Chorley
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VINCI Energies
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Senior Principal Hardware Engineer
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Lead cutting-edge hardware engineering for safety-critical aviation technology, including Helmet-Mounted Displays and Flight Controls. This senior role in Rochester, UK, requires expertise in Mentor Graphics, signal integrity, and the full development lifecycle. You will mentor junior engineers w...
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United Kingdom , Rochester
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69.72 - 92.24 GBP / Hour
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Morson Talent
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Senior / Principal Electrical Engineer
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Join BakerHicks as a Senior/Principal Electrical Engineer in Motherwell. Lead multi-disciplinary teams, delivering expert electrical design and safety solutions from concept to decommissioning. This role offers a company car, pension, and professional development for chartered engineers passionat...
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United Kingdom , Motherwell
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Morgan Sindall Plc
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EC&I Designer, Engineer, Senior Engineer, Principal Engineer
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Join Actemium Design's EC&I team in Chorley or Whitehaven. Develop innovative electrical, control & instrumentation designs for major industrial projects. We seek engineers with EC&I experience, CAD proficiency, and knowledge of UK standards. Enjoy a competitive package, hybrid working, and globa...
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United Kingdom , Chorley and Whitehaven
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VINCI Energies
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Senior / Principal Electrical Critical Systems Engineer
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Join our global data centre team in Newcastle as a Senior/Principal Electrical Engineer. Drive high-profile projects, delivering critical electrical design and consulting for world-class facilities. Benefit from specialist mentorship and technical training while shaping innovative, client-focused...
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United Kingdom , Newcastle
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Cundall
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Senior/ Principal Civil Design Engineer
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Seeking a Senior/Principal Civil Design Engineer for a hybrid role across multiple UK offices. You will deliver high-quality engineering design for water and sewage treatment projects, ensuring cost-effective and safe solutions. The role requires a relevant HND/degree and extensive civil engineer...
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United Kingdom , Derby; Rickmansworth; Bristol; Falmer; Coleshill; Peterborough
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Morson Talent
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Senior Principal Software Engineer
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Lead architectural development for cybersecurity products as a Senior Principal Software Engineer at Rapid7 in Belfast. This role requires 12+ years of Java experience and expertise in designing complex, scalable enterprise software. You will drive technical strategy, foster innovation, and champ...
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United Kingdom , Belfast
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Rapid7
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About the Senior Principal Engineer role

Explore the pinnacle of technical leadership with Senior Principal Engineer jobs. This elite role represents the highest echelon of individual contributor engineering, where professionals transcend typical technical duties to become strategic visionaries and organizational authorities. A Senior Principal Engineer is not merely a senior developer; they are the cornerstone of architectural direction, innovation, and technical excellence for entire business units or the company at large. Individuals in these roles possess a rare blend of deep technical mastery, profound business acumen, and influential leadership, shaping the technological future of their organizations.

Professionals in these senior principal engineer jobs are primarily responsible for defining and evangelizing organization-wide architectures and long-term technology roadmaps. They evaluate and integrate emerging technologies, making critical decisions that align complex technical strategies with overarching business goals. A core aspect of their work involves solving the most ambiguous, large-scale, and high-impact problems, often creating novel solutions that become foundational for future products. They establish engineering standards, methodologies, and best practices, ensuring consistency, quality, and scalability across multiple teams and platforms. Furthermore, they act as internal consultants and ultimate technical authorities, sought out to resolve deep architectural challenges and de-risk major initiatives.

Beyond design, Senior Principal Engineers are hands-on leaders in innovation, frequently contributing to patents, whitepapers, and industry standards. They possess a proven history of deploying transformative solutions at scale. Mentorship is a key responsibility, as they are expected to elevate the entire engineering organization by guiding and inspiring senior engineers and architects, setting a gold standard for technical excellence. Their role demands constant collaboration with executive business leadership, product management, and sometimes external partners, requiring them to translate complex technical concepts into strategic business value.

Typical requirements for these high-caliber positions include 12+ years of progressive experience, often with a advanced degree in Computer Science or a related field. Essential skills encompass mastery in system architecture (including cloud, microservices, and distributed computing), a security-first mindset, and full-stack development fundamentals. However, the distinguishing competencies are strategic thinking, exceptional communication and influence, and a relentless drive for innovation. Success in senior principal engineer jobs hinges on the ability to navigate technical complexity while driving tangible business outcomes, making these roles critical for any organization aiming to maintain a competitive technological edge. If you are an engineer who defines the art of the possible, these positions represent the ultimate career destination.