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Principal United Kingdom, London Jobs

187 Job Offers

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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Salary
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RedCloud
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Until further notice
Principal Electrical Engineer
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Principal Electrical Engineer sought for Egis Transport Solutions in London. Lead rail station electrical design, manage a team, and ensure project delivery. Requires a degree, chartered status, and deep knowledge of Network Rail, HS2, and TfL standards. Join a dynamic team driving innovation in ...
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Egis in the UK
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Until further notice
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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Until further notice
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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Until further notice
Private Client Tax Principal
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Join a leading tax team as a Private Client Tax Principal in London. Advise high net worth individuals on succession planning, inheritance tax, and wealth protection structures. Leverage deep expertise in trusts and estates to drive client growth and business development. Enjoy comprehensive bene...
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Salary
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BDO UK LLP
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Until further notice
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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Until further notice
Principal Cable Design Engineer
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Seeking a Principal Cable Design Engineer for a remote role with ad-hoc UK office attendance. You will lead high-voltage AC/DC cable system design from 11kV to 400kV, using CYMCAP and CAD. Requires expertise in UK HSE legislation, CDM, and client-facing consultancy. Earn £70-£90/hr (outside IR35)...
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Salary
70.00 - 90.00 GBP / Hour
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Morson Talent
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Until further notice

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.