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Principal United Kingdom Jobs (Hybrid work)

348 Job Offers

Senior / Principal Power Systems Engineer
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AECOM seeks a Senior/Principal Power Systems Engineer in Leeds to deliver grid connection projects across the UK and Ireland. Requires expertise in PSCAD, PowerFactory, UK Grid Code and HV protection.
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AECOM
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Principal Mechanical Engineer
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Lead mechanical design on major UK water and wastewater projects with Egis in London, Bristol or Manchester. Hybrid working, rapid progression and a high-growth environment await experienced chartered engineers.
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Egis Group
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Principal Flood Risk Consulant
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Lead flood risk projects across the UK with Egis as a Principal Flood Risk Consultant in Bristol. Requires 7+ years' experience, chartered status, and expertise in FRAs, hydraulic modelling, and SuDS.
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Egis Group
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Principal Flood Risk Consulant
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Lead flood risk projects across the UK with Egis as a Principal Flood Risk Consultant. Requires 7+ years' experience, chartered status, and expertise in FRAs, hydraulic modelling, and SuDS. London-based growth role.
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Egis Group
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Principal Wastewater Modeller
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Lead Infoworks ICM wastewater modelling at Egis UK in Bristol. Hybrid role driving SuDS, CSO performance and sustainable infrastructure. Requires 8+ years' experience, scripting skills and mentoring ability.
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Egis Group
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Principal Wastewater Modeller
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Lead wastewater modelling projects at Egis UK as Principal Wastewater Modeller in Manchester. Requires 8+ years Infoworks ICM experience, hydraulic modelling expertise, and mentoring skills. Hybrid role with fast career progression.
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Egis Group
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Principal Network Modeller
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Lead Infoworks ICM wastewater modelling at Egis UK in London, Bristol or Manchester (hybrid). Mentor colleagues, champion SuDS and sustainable drainage, and deliver innovative hydraulic modelling projects UK-wide.
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Egis Group
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Principal Wastewater Modeller
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Lead Infoworks ICM wastewater modelling at Egis UK in London, Bristol or Manchester (hybrid). Shape sustainable drainage and CSO performance with a global leader offering fast progression and top-tier benefits.
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Egis Group
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Principal Electrical Engineer
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Lead electrical/EICA design on UK water and wastewater projects at Egis in London, Bristol or Manchester. Requires chartered status, 7-10+ years' experience and multidisciplinary technical leadership. Hybrid working with fast progression.
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Egis Group
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Principal Mechanical Engineer
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Lead mechanical design on major UK water and wastewater projects with Egis in Manchester. Requires Chartered status, 7-10+ years' design experience and proven technical leadership. Hybrid working with fast progression.
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Egis Group
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Principal Electrical Engineer
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Lead electrical/EICA design on UK water and wastewater projects with Egis in Manchester. Requires chartered status, 7-10+ years' experience and strong UK water standards knowledge. Hybrid working with fast progression.
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Egis Group
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Principal Flood Risk Consulant
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Lead flood risk projects across the UK with Egis as a Principal Flood Risk Consultant in Manchester. Requires 7+ years' experience, chartered status, and expertise in FRAs, hydraulic modelling, and SuDS.
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Egis Group
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Principal Urban Drainage Modeller
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Lead Infoworks ICM wastewater modelling at Egis UK in London, Bristol or Manchester (hybrid). Mentor colleagues, champion SuDS and sustainable drainage, and deliver innovative hydraulic modelling projects UK-wide.
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Egis Group
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Principal Mechanical Engineer
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Assystem seeks a Principal Mechanical Engineer in Whitehaven to lead requirements capture and mentor Senior Engineers. Requires HNC, strong BS8888/ISO-GPS knowledge, FMEA experience, and expertise in design and fabrication.
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ASSYSTEM
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Principal Mechanical Engineer
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Assystem seeks a Principal Mechanical Engineer in Warrington to lead requirements capture and engineering activities for nuclear waste containers. Requires HNC minimum, BS8888/ISO-GPS expertise, FMEA knowledge, and strong stakeholder management skills.
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ASSYSTEM
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Principal Civil Engineer – Renewables & Transmission & Distribution
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Lead civil engineering role in Birmingham focused on renewables and UK transmission & distribution projects (11kV-400kV). Requires BEng, chartership progress, and strong technical design skills. Mentor junior staff and coordinate multidisciplinary teams.
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AECOM
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Principal Civil Engineer – Renewables & Transmission & Distribution
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Lead civil engineering role in Manchester focusing on renewables and UK transmission & distribution projects (11kV-400kV). Requires BEng, chartership progress, and expertise in civil/structural design for energy transition infrastructure.
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AECOM
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Principal Civil Engineer – Renewables & Transmission & Distribution
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Lead civil engineering role in Belfast focusing on renewables and UK transmission & distribution projects (11kV-400kV). Requires BEng, chartership progress, and expertise in civil/structural design for energy transition infrastructure.
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AECOM
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Principal Machine Learning Engineer
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ASOS
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Principal Systems Engineer
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alten
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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.