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Principal United Kingdom Jobs

592 Job Offers

Principal Designer for CDM and Building Regulations
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Principal Designer sought for a 50/50 CDM and Building Regulations role in London. Join a multidisciplinary consultancy, managing risk on large-scale Commercial, Healthcare, and complex Residential projects. Requires 5+ years in Architectural or CDM Principal Design, with APS or ARB certification...
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70000.00 - 80000.00 GBP / Year
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Brandon James
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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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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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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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Egis in the UK
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Principal Software Engineer
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Principal Software Engineer sought for a high-impact role in London, UK, focusing on Workload Identity. You will design and develop secure communication solutions using Golang, Kubernetes, and cloud technologies. This position requires deep expertise in security, networking, and enterprise-scale ...
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Palo Alto Networks
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Principal Backend Engineer
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Principal Backend Engineer sought for fully remote role within UK/EU at MPG, a leader in multiplayer game development. You will architect and deploy backend services for high-concurrency titles, acting as key client contact. Requires expertise in Java, Golang, or C#, cloud platforms (AWS, Azure, ...
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Climax Studios
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Principal Power Systems Engineer
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Principal Power Systems Engineer role at NTT Data, supporting UK & Ireland Critical National Infrastructure. Lead network design and modelling for DNOs/TSOs, specializing in Load Flow, Fault Level, and G99 compliance. Requires Master’s/PhD in Power Systems, 10+ years’ experience, and expertise in...
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NTT DATA
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Principal Rendering Engineer
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Principal Rendering Engineer sought by MPG to craft high-performance rendering systems for AAA games on PC, consoles, and Mac. You will write low-level engine code using DirectX 12, Vulkan, and Metal, tackling GPU-driven pipelines and ray tracing. Requires deep C++ expertise and a track record sh...
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Climax Studios
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Principal Fire Safety Consultant
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Principal Fire Safety Consultant sought in Leicester to lead fire strategy development for high-rise commercial and large-scale projects. You’ll manage complex developments, produce fire strategies, and conduct Fire Risk Assessments (FRAs) while building strong client relationships. Requires exte...
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Salary
65000.00 - 75000.00 GBP / Year
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Brandon James
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Principal Presales Engineer (German Speaking)
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Twilio seeks a German-speaking Principal Presales Engineer in the UK to lead technical wins for new and strategic clients. You will drive discovery, design architectures, and deliver compelling demos of our communications APIs. Ideal candidates have 8+ years in technical pre-sales, development ex...
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Stytch
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Principal Safety Case Engineer
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Principal Safety Case Engineer role in Warrington, UK. Lead nuclear safety projects, developing hazard management strategies and safety case reports. Requires a degree in engineering, Chartered status (or working towards), and broad safety case experience. Join a growing team, mentor engineers, a...
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Morson Talent
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Principal Solution Consultant - BOS
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Principal Solution Consultant (BOS) sought in Reading, UK to drive BSS/OSS sales growth across MMEA. Leverage 15+ years in telecom/IT consulting to lead complex pre-sales engagements, design tailored solutions, and articulate value propositions. Requires deep E2E Telco architecture knowledge, con...
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Ericsson
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Principal IT Pillar Specialist
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Principal IT Pillar Specialist and AVEVA E3D Administrator sought for a key role in Chiswick, London. Leverage 10+ years of expertise in PML and .NET to configure, customize, and automate complex engineering systems. Drive best practices and lead projects independently within a global IT framewor...
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McDermott
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Principal Fire Engineer
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Principal Fire Engineer sought by a leading consultancy in Manchester. Lead complex projects across residential, commercial, and healthcare sectors, delivering innovative fire strategies. Requires extensive consultancy experience, UK Building Regulations knowledge, and chartered status. Benefits ...
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75000.00 - 95000.00 GBP / Year
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Brandon James
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Principal Building Automation Engineer
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Cundall seeks a Principal Building Automation Engineer to lead BMS, DDC, SCADA, and PLC design across UK offices (Birmingham, Bristol, Edinburgh, London, Manchester, Newcastle). You will collaborate with multidisciplinary teams on innovative controls for mechanical plant and electrical monitoring...
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Location
United Kingdom, Birmingham, Bristol, Edinburgh, London, Manchester, Newcastle
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Cundall
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Principal Technical & Complex Claims Leader
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Principal Technical & Complex Claims Leader sought to shape the future of motor insurance with Prima (part of AXA Group) in Manchester. This senior role demands 10+ years of UK Motor Insurance leadership, driving claims transformation and managing multi-million pound portfolios. You will design i...
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Prima
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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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Location
United Kingdom, Newcastle upon Tyne
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ASSYSTEM
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Assistant CDM Principal Designer
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Join a friendly, experienced CDM team in Kent as an Assistant CDM Principal Designer. You will support risk management during the design stage, review Construction Phase Plans, and conduct site inspections. Ideal candidates have 1+ year in construction/H&S, a relevant degree, and a NEBOSH certifi...
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Salary
38000.00 - 45000.00 GBP / Year
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Brandon James
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Principal Backend Engineer
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Principal Backend Engineer sought for fully remote, UK/EU-based role driving backend services for top game projects. You’ll architect distributed systems for high-concurrency users, mentor engineers, and liaise with co-dev clients. Requires expertise in Java, Golang, or C#, cloud platforms (AWS, ...
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Climax Studios
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Cdm Principal Designer
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CDM Principal Designer role in Northampton with a leading multi-disciplinary consultancy. You will lead major projects across complex sectors, leveraging long-standing frameworks for stability and growth. Ideal for an experienced CDM professional (2+ years, APS/IOSH membership) seeking work-life ...
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Salary
50000.00 - 55000.00 GBP / Year
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Brandon James
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About the Principal role

A Principal role represents a senior leadership position found across various industries, from construction and engineering to technology and product management. Individuals in these jobs are trusted with high-level strategic oversight, complex problem-solving, and driving significant organizational impact. Unlike entry-level or mid-career positions, Principal jobs typically require a deep well of specialized expertise, a proven track record of leadership, and the ability to influence direction without direct managerial authority over every team member.

In a professional context, a Principal is often the highest individual contributor or a senior team lead responsible for shaping the vision and execution of critical initiatives. For example, in design and construction sectors, a Principal Designer focuses on risk management from the earliest stages of a project. They ensure that health and safety regulations, such as the CDM Regulations 2015, are integrated into the design process, mitigating hazards before construction begins. This involves leading cross-functional coordination, conducting design reviews, and ensuring a seamless handover to contractors.

In technology and business strategy, Principal Product Managers own the end-to-end lifecycle of complex service portfolios or product lines. They are responsible for defining strategy, developing business cases, and launching innovative offerings that drive customer adoption and revenue growth. These roles demand a data-driven approach to decision-making, strong cross-functional leadership, and the ability to influence executives and stakeholders across engineering, sales, marketing, and customer success teams. Common responsibilities include market analysis, competitive benchmarking, pricing strategy, and building go-to-market plans.

Typical skills required for Principal jobs include exceptional communication and presentation abilities, strategic thinking, and a high degree of autonomy. Candidates usually possess a bachelor’s or master’s degree in a relevant field, combined with significant experience—often eight or more years in a related domain. Technical proficiency is critical, whether in understanding network security, cloud infrastructure, or construction regulations. Soft skills such as negotiation, mentorship, and the ability to drive alignment in matrixed organizations are equally important.

Ultimately, Principal jobs are about leading from the front, solving the most challenging problems, and setting the standard for excellence within an organization. Whether mitigating risk on a construction site or defining the future of a software platform, these professionals are integral to driving meaningful, lasting results.