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Principal United Kingdom, London Jobs (Hybrid work)

118 Job Offers

Principal Structural Engineer
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Principal Structural Engineer sought for a UK-based role with a global sustainable design consultancy. Lead complex projects across industrial, tech, and defence sectors, including data centres and gigafactories. Requires Chartered status (IStructE/ICE), SC clearance eligibility, and expertise in...
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500.00 - 600.00 GBP / Day
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Morson Talent
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Principal Consultant in Product Lifecycle Management - Aerospace & Defence
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Principal Consultant in PLM for Aerospace & Defence, driving digital engineering transformation across Bristol, London, or Manchester. Leverage 10+ years of PLM expertise, including Siemens solutions, to lead BOM management, change/config, and CAD/CAE integration. Shape business cases and roadmap...
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United Kingdom, Bristol, London, Manchester
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PA Consulting
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Principal Engineer - CPTO, BPL
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Principal Engineer role in CPTO, BPL, shaping scalable distributed services for critical business operations. Requires deep JVM expertise (Kotlin, Java), cloud-native mindset (AWS, Azure, GCP), and fintech/payments experience. Based in London or Northampton, UK, with benefits including private me...
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United Kingdom, London, Northampton
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Barclays
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Principal Safety Engineer
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Principal Safety Engineer sought for Bolt’s Autonomous Driving team in London. You will lead safety cases for Level 4 systems, mastering ISO 26262, SOTIF, and cybersecurity standards. Requires 10+ years in safety-critical engineering and deep knowledge of autonomous architecture. Enjoy a hybrid r...
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Bolt
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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 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 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 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 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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Principal Sales Engineer
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Seeking a Principal Sales Engineer in London to join Seismic’s AI-powered enablement platform. You’ll partner with sales teams, delivering agentic AI demonstrations and driving enterprise SaaS opportunities within Financial Services. Requires 8+ years presales experience, fluency in AI governance...
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Seismic
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Snr/ Principal Associate Contentious Construction
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Senior/Principal Associate sought for Contentious Construction role in Birmingham, Exeter, Leeds, London, Manchester, or Winchester. You will handle complex disputes across PFI, NEC, and JCT contracts for public and private clients in health, local government, and housing. Ideal candidates bring ...
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United Kingdom, Birmingham, Exeter, Leeds, London, Manchester, Winchester
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360 Resourcing Solutions
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Senior Principal Associate Contentious Construction
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Senior Principal Associate Contentious Construction sought for a national team across Birmingham, Exeter, Leeds, London, Manchester, and Winchester. You will advise on high-value, complex projects for public and private clients in health, housing, and emergency services. Key requirements include ...
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Location
United Kingdom, Birmingham, Exeter, Leeds, London, Manchester, Winchester
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Capsticks Solicitors LLP
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Principal Data Engineer/Data Architect
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Principal Data Engineer/Data Architect sought in London to design scalable data warehouse architecture, build ELT pipelines, and drive data-driven decisions. Expertise in Snowflake, PostgreSQL, Python, and data modelling required. Mentor engineers, ensure system uptime, and deliver data products....
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RedCloud
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Interim Principal Accountant
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Seeking an experienced **Interim Principal Accountant** for a senior role in London, UK. You will drive **budgeting and planning** within a local government organisation, producing critical budget reports and managing allocations. Collaborate with the Strategy and Planning team to align financial...
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Allen Lane
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Principal Tech Team Lead (Front End)
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Principal Tech Team Lead (Front End) role in London. Lead and mentor 3-5 Tech Team Leads, scaling React/TypeScript architecture and driving performance, accessibility, and testing standards. Requires deep frontend expertise, coaching skills, and a servant-leadership mindset. Benefits include £85k...
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85000.00 - 125000.00 GBP / Year
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Xelix
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Principal Illicit Finance Analyst
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Principal Illicit Finance Analyst sought to lead crypto and illicit finance investigations in London. This role combines advanced OSINT and blockchain tracing to map adversarial networks for governments and platforms. Ideal for an investigative journalist-minded analyst with 3+ years in crypto-en...
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Protection Group International
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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.