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Principal United Kingdom Jobs

590 Job Offers

Principal Opto-Electronics Device Engineer
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Join Microsoft Research in Cambridge, UK as a Principal Opto-Electronics Device Engineer. You will design and optimize high-speed photonics devices for next-gen AI infrastructure, using tools like COMSOL and Lumerical. This role requires a PhD in a relevant field, expertise in semiconductor physi...
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Not provided
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Microsoft Corporation
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Until further notice
Building Regulations Principal Designer
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A unique opportunity for a Chartered Architect to transition into a **Building Regulations Principal Designer** role in Sevenoaks. Leverage your knowledge of the **Building Safety Act** to secure Gateway approvals on high-profile London projects. This role offers clear career progression, support...
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60000.00 - 70000.00 GBP / Year
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Brandon James
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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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Not provided
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Protection Group International
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Until further notice
Senior CDM Principal Designer
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Senior CDM Principal Designer role in Birmingham with a leading multi-disciplinary consultancy. You will lead project delivery and drive business development across residential, commercial, and healthcare sectors. Requires 4+ years’ CDM experience, APS/IOSH membership, and a track record in winni...
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60000.00 - 70000.00 GBP / Year
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Brandon James
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Until further notice
Principal Software Engineer
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Principal Software Engineer sought for a Luton-based role supporting mission-critical embedded systems. Requires ISTQB knowledge, strong test automation skills (Python, C++), and active SC Clearance. You will create automated test scripts, perform integration and regression testing, and collabora...
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74.00 GBP / Hour
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Morson Talent
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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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70.00 - 90.00 GBP / Hour
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Morson Talent
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Until further notice
Principal Presales Engineer, Product Specialist - CDP, Martech, AI
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Twilio seeks a Principal Presales Engineer to bridge complex enterprise accounts with Product teams, specializing in CDP, Martech, and AI. You will architect multi-product solutions, drive technical wins, and influence product strategy through compelling storytelling. Based in the United Kingdom,...
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Not provided
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Stytch
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Until further notice
Assistant Principal Quality and Innovation
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Join City of Portsmouth College as Assistant Principal Quality & Innovation. Lead our Quality team to achieve excellence, driving continuous improvement and high expectations. Spearhead our digital strategy, inspiring staff with innovative technology. Based in Portsmouth, enjoy 37 days leave, Tea...
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59496.79 - 63111.83 GBP / Year
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360 Resourcing Solutions
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Senior CDM Principal Designer
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Senior CDM Principal Designer role in Nottingham with a leading multi-disciplinary consultancy. You will lead project delivery and drive business development across residential, commercial, and healthcare sectors. Requires 4+ years’ CDM experience, APS/IOSH membership, and a track record in winni...
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Salary
60000.00 - 70000.00 GBP / Year
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Brandon James
Expiration Date
Until further notice
Building Regulations Principal Designer
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Senior Building Regulations Principal Designer role in Manchester with a leading multi-disciplinary consultancy. You will lead project delivery and drive business development across residential, commercial, and healthcare sectors. Requires 4+ years in Building Control or Principal Designer roles,...
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Salary
60000.00 - 70000.00 GBP / Year
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Brandon James
Expiration Date
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.