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Principal United Kingdom Jobs

592 Job Offers

Principal Software Engineer
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Principal Software Engineer sought by Microsoft’s ISE team in London to co-engineer high-scale solutions with customers. You will lead technical strategy, containerize workloads, and leverage AI to solve complex challenges. Requires deep coding expertise (C++, Python, etc.) and customer-facing ex...
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Microsoft Corporation
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Senior/ Principal Landscape Architect
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Join Morson’s award-winning Cardiff team as a Senior or Principal Landscape Architect. Lead LVIA, EIA, and design projects within a collaborative environmental consultancy. We seek Chartered professionals with 3-5+ years’ post-Chartership experience, AutoCAD proficiency, and a full driving licenc...
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Morson Talent
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Principal / Associate Town Planner
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Principal / Associate Town Planner role in Cardiff with a design-led consultancy. Seeking MRTPI-qualified professionals with 8-10+ years’ experience to lead projects across residential, healthcare, and regeneration sectors. Manage client relationships, planning applications, and business developm...
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45000.00 - 55000.00 GBP / Year
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Morson Talent
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Principal Solutions Architect
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Principal Solutions Architect sought to design and govern integrated digital project controls environments for major UK capital programmes. This domain-specialised role requires deep expertise in EPPM platforms (EcoSys, Primavera P6/Unifier, Aconex) and core processes like cost, schedule, risk, a...
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United Kingdom, London, Manchester
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Amentum
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Principal Software Engineer
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Principal Software Engineer sought by Mastercard to lead DevOps automation across on-prem and cloud infrastructure. Leverage Terraform, Ansible, Chef, and Kubernetes to build CI/CD pipelines and drive Infrastructure as Code. Requires 10+ years’ experience, strong Linux skills, and cloud expertise...
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Mastercard
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Principal Consultant in Product Lifecycle Management - Aerospace & Defence
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Seeking a **Principal Consultant in Product Lifecycle Management** for our Aerospace & Defence practice. This hybrid role, based in **Bristol, London, or Manchester**, requires 10+ years of PLM expertise, including BOM management and Siemens solutions. You will lead PLM transformation initiatives...
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PA Consulting
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Principal Opto-Electronics Engineer
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Principal Opto-Electronics Engineer at Microsoft Research in Cambridge, UK. Drive high-risk, high-reward AI infrastructure programs, co-designing next-gen optical transceivers and connectivity systems. Requires a PhD, expertise in analog/mixed-signal CMOS circuits, signal processing, and end-to-e...
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Microsoft Corporation
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Principal Environmental Consultant
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Lead environmental impact assessments and sustainability initiatives as a Principal Environmental Consultant with M Group Highways in Stevenage. You’ll deliver EIA, carbon reduction, and biodiversity solutions on complex UK infrastructure projects. Degree qualified and chartered, you bring consul...
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United Kingdom, Chells, Stevenage
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Social Value Portal Ltd
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Principal Embedded Software Engineer
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Principal Embedded Software Engineer sought for maritime defence projects at TKMS Atlas in Winfrith Newburgh, UK. This senior hands-on role involves leading embedded C/C++ development for underwater vehicle control systems and sonar equipment. You will define engineering processes, guide teams, a...
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United Kingdom, Winfrith Newburgh
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Morson Talent
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Principal Product Data Scientist
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Principal Product Data Scientist role in London: Lead technical strategy for product data science, driving AI and experimentation innovation. Expert-level Python, SQL, and machine learning required. Shape product vision, influence senior leadership, and integrate emerging AI technologies. A strat...
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Tripadvisor
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Principal Electrical Critical Systems Engineer
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Principal Electrical Critical Systems Engineer sought by a top-ranked, partner-owned consultancy in London. Join our award-winning Data Centre team, delivering low-carbon, resilient engineering solutions. You need a degree in Electrical Engineering, consulting experience, and a drive to excel in ...
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Cundall
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Principal Structural Engineer
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Principal Structural Engineer sought for a Birmingham-based role leading prestigious UK and international projects. This client-focused position requires a Chartered Engineer (CEng) with significant design experience in a multi-disciplinary consultancy. You will drive business development, manage...
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Cundall
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Building Regulation Principal Designer
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Join a growing Architectural Practice in Canterbury as a Building Regulations Principal Designer. You will ensure compliance from design to completion, advising on the Building Safety Act and Gateway submissions. Ideal for Architects or Technologists with 5+ years’ experience and RIBA/ARB/CIAT me...
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52000.00 - 60000.00 GBP / Year
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Brandon James
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Building Regulation Principal Designer
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Join a growing London-based Architectural Practice as a Building Regulations Principal Designer. Leverage your 5+ years’ experience as an Architect or Technologist to ensure compliance from design to completion. Advise on Building Safety Act requirements, Gateway submissions, and duty holder resp...
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52000.00 - 60000.00 GBP / Year
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Brandon James
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Principal Digital Investigations Analyst
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Principal Digital Investigations Analyst sought for London-based role tackling disinformation and digital threats. Leverage advanced OSINT skills to investigate state and non-state actors, attribute information operations, and produce concise threat reports. Requires 5+ years in OSINT, client man...
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Protection Group International
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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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Citi
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Cdm Principal Designer
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A design-led consultancy seeks an Architect or Design professional to transition into a CDM Principal Designer role in London. You will lead diverse projects, applying design risk management to eliminate hazards at early stages. The role requires strong knowledge of CDM Regulations 2015 and clear...
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50000.00 - 55000.00 GBP / Year
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Brandon James
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Principal Field Marketing Manager
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Smartsheet seeks a Principal Field Marketing Manager to lead enterprise demand generation for the EMEA Sales team in London. You will architect regional strategy, drive pipeline creation, and orchestrate high-impact events. This role requires 7-10+ years of B2B field marketing experience and nati...
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Smartsheet
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CDM Principal Designer – Architect
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A market-leading consultancy seeks an ARB/RIBA-registered Architect to transition into a CDM Principal Designer role in Manchester. You will lead design risk management across diverse projects, ensuring compliance with CDM 2015 Regulations. This hybrid role offers a car allowance, generous bonus,...
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45000.00 - 60000.00 GBP / Year
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Brandon James
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Principal Data Analyst
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Principal Data Analyst role in London with a fast-growing digital business. Lead a small analytics team, driving commercially impactful insight across a critical domain. Requires advanced SQL, dbt, and visualization skills, plus experience mentoring analysts. High-ownership position influencing s...
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95000.00 - 105000.00 GBP / Year
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Data Idols
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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.