19 principal mechanical design engineer jobs found

Piping Designer - Water Industry (Revit) Position Summary: We are seeking a skilled and detail-oriented Piping Designer to join our engineering team, supporting the design and coordination of water infrastructure projects. Reporting to the Principal Engineer, this role will focus on the design and layout of wet wells, pump chambers, and associated ductile iron pipework, with an emphasis on constructability, maintainability, and operational access. Must have experience working with Revit in 3D design environments and supporting multi-disciplinary project teams in the water infrastructure sector Key Responsibilities: Produce 3D models and detailed general arrangement drawings (GAs) using Revit. Develop layouts of wet and dry well pumping stations, concrete pump chambers, ductile iron and epoxy coated carbon steel pipework, valves, and pipe support systems. Coordinate and integrate vendor equipment packages into the design. Layout and model access platforms, stairs, handrails, and...

The Opportunity PWHytek Ltd are currently recruiting for a number of Senior and Principal Mechanical Engineers to support a major programme of work within the UK nuclear sector. This is an excellent opportunity to join a high-profile engineering programme, supporting the design, operation and ongoing safety of nuclear power generation. We are looking for experienced engineers who can bring specialist knowledge from operational nuclear facilities or nuclear plant design to support technically challenging projects. The Role Working as part of a multidisciplinary engineering team, you will provide technical expertise across mechanical engineering activities, supporting the delivery of engineering solutions within a highly regulated environment. Successful candidates will contribute to engineering assessments, design activities, safety case justification and operational support across a range of nuclear projects. Key Responsibilities * Deliver high-quality mechanical or...

The Opportunity PWHytek Ltd are currently recruiting for a number of Senior and Principal EC&I Engineers to support a major programme of work within the UK nuclear sector. This is an excellent opportunity to join a high-profile engineering programme, supporting the design, operation and ongoing safety of nuclear power generation. We are looking for experienced engineers who can bring specialist knowledge from operational nuclear facilities or nuclear plant design to support technically challenging projects. The Role Working as part of a multidisciplinary engineering team, you will provide technical expertise across EC&I engineering activities, supporting the delivery of engineering solutions within a highly regulated environment. Successful candidates will contribute to engineering assessments, design activities, safety case justification and operational support across a range of nuclear projects. Key Responsibilities * Deliver high-quality mechanical or EC&I...

Principal Mechanical Engineer Warrington (Hybrid - 3 Days On Site) £56-61 per hour | Inside IR35 Are you an experienced Principal Mechanical Engineer looking to play a key role on one of the UK's most complex engineering programmes? We're seeking an innovative engineer to join a specialist design team supporting the development of bespoke tooling and equipment for critical plant operations. This is an opportunity to lead technical delivery from concept through to deployment while managing a small team of engineers and designers. The Opportunity Working within a multidisciplinary environment, you'll be responsible for driving the development of specialist mechanical tools that support plant operations and retrieval activities. You'll oversee projects from initial requirements capture through concept design, trials, manufacture and final handover to operational teams. This is a highly collaborative role, working closely with innovation teams, manufacturing partners and site...

PWHytek Ltd are currently recruiting for a number of Senior and Principal Engineers to support a major programme of work within the nuclear sector on a contract basis. We are looking to speak with experienced Mechanical, Process and EC&I Engineers who have a strong background in uranium enrichment, plant design and/or commissioning. This is an excellent opportunity to join a long-term programme supporting the delivery of highly complex nuclear facilities while working remotely. The Role Successful candidates will provide technical engineering support across the design, development and delivery of nuclear projects, working as part of multidisciplinary engineering teams within a highly regulated environment. Depending on your discipline and experience, responsibilities may include: * Delivering engineering and design solutions for complex nuclear facilities. * Supporting plant design activities across all project phases. * Providing commissioning support and...

Senior and Principal Security Architects £50-£90 per hour (Dependent on experience and level) - Inside IR35 12 month contracts Hybrid - 2/3 days a week on site - Warton (PR4) **Applicants must have the right to work in the UK** **Successful applicants must be eligible for SC/DV clearance** Role Purpose / Overview Highly experienced security architects with strong technical credentials across enterprise, cloud, network and classified environments. Responsible for designing end-to-end secure architectures (HLD/LLD), leading Design Authorities and Technical Design Authorities, and providing architectural assurance across multi-supplier programmes up to TOP SECRET / Above Secret classifications. Ensures Secure-by-Design principles are embedded from the outset across all programmes. Key Outcomes Security is consistently embedded into system design across all programmes Architectural decisions align with Secure-by-Design principles from the outset Complex, multi-partner and...

Senior Structural Engineer - Data Centre Projects Beckenham | Hybrid Working (2-3 Days Office) £39-£44 per hour 6-Month Contract (Temporary) | Outside IR35 An exciting opportunity has arisen for an experienced Senior Structural Engineer to support the delivery of a major data centre development within a specialist structural engineering consultancy. This Senior Structural Engineer role is ideal for someone who enjoys leading technically complex structural projects, managing client relationships and delivering practical engineering solutions from design through to construction. The successful Senior Structural Engineer will take ownership of a major long-term data centre project, working closely with clients, contractors and multidisciplinary teams while providing technical leadership throughout the project lifecycle. The Role As a Senior Structural Engineer, you'll be involved in: Leading the structural design and delivery of a major data centre project Producing...

Principal Platform Engineer (CyberArk/PAM) Active DV Clearance Highly Preferred, Lapsed DV Considered | UKEO | 6 Month Contract Initially | £100/hour Umbrella | Fully Onsite in Yeovil (compressed hours considered) We're recruiting for an experienced Principal Platform Engineer to join a high-profile defence programme, providing specialist expertise across Privileged Access Management (PAM) within a secure enterprise environment. This role is suited to someone with strong CyberArk and enterprise platform experience who enjoys solving complex technical challenges, influencing solution design and acting as the subject matter expert within a multidisciplinary engineering team. Key Responsibilities Act as the technical authority for the Privileged Access Management (PAM) domain. Lead the design and implementation of secure platform solutions across on-premise, hybrid and cloud environments. Capture, analyse and interpret complex customer requirements to drive secure solution...

Principal Product Designer (UI Design & Digital Product Design) £650 per day | Inside IR35 6-month contract London – Hybrid (2 days per week onsite) Overview We're looking for an exceptional Principal Product Designer to play a key role in building a large-scale digital platform from the ground up. This is a rare greenfield opportunity to define the visual identity, interaction patterns and design standards for a suite of modern digital products. Working closely with Product, Engineering and senior stakeholders, you'll create outstanding user experiences while establishing a scalable design system that will underpin the platform for years to come. This role is ideal for a highly experienced designer with exceptional UI and interaction design skills, a strong portfolio of shipped products, and a passion for creating elegant, intuitive experiences at scale. Role & Responsibilities Own and evolve the visual design language across multiple digital products. Create...

DV Cleared Principal Platform Engineer - Platform Security & Infrastructure 📍 Location: Yeovil (Onsite) 💰 Rate: £680 - £713 per day (Inside IR35) 📅 Contract: 12 Months ⏰ Working Pattern: Full-time or condensed week available (work 3 long days and get paid for 5) 🔒 Security Clearance: Active UK Developed Vetting (DV) Clearance required Principal Platform Engineer - Secure Platforms | Defence & National Security We're seeking an experienced DV Cleared Principal Platform Engineer to join a high-profile programme delivering secure, mission-critical platforms supporting defence, government, and national security operations. This is an opportunity to work at the forefront of platform security, enterprise infrastructure, and cyber engineering, taking ownership of complex technical challenges within highly secure environments. You'll play a key role in designing, integrating, and delivering resilient platforms that underpin critical operational capabilities. For candidates...

Principal Traffic Engineer London 5-month contract (minimum) £350 - £425 per day, Inside IR35 Are you an experienced Principal Traffic Engineer looking for your next challenge?   Our client is an ambitious authority who are seeking an experienced Principal Traffic Engineer to join them on a contract basis, initially for 5 months.   Key Responsibilities: ·Responsible for leading the technical team in the planning, investigation and delivery of traffic and parking engineering measures and schemes. ·The post holder will be responsible for budget, contract and project management, ensuring compliance with policies and procedures. ·The post holder will support the Transport and Projects Manager in organising technical staff and administering the service, while representing the service and deputising for the Manager when necessary. ·Oversee the identification, appraisal, and design of traffic and parking schemes ·Prepare committee reports, technical reports, briefing...

Principal Traffic Engineer Our client, a prominent entity in the Highways sector, is currently seeking a Principal Traffic Engineer to join their team on a contract basis. This role is critical in leading the technical team in planning, investigation, and the delivery of traffic and parking engineering measures and schemes. This is an exciting opportunity to play a significant role in the management and execution of high-profile traffic engineering projects. Key Responsibilities: Leading the technical team in the planning, investigation, and delivery of traffic and parking engineering measures and schemes Overseeing the identification, appraisal, and design of traffic and parking schemes Managing budgets, contracts, and projects to ensure full compliance with organisational policies and procedures Procuring and supervising consultancy and design services in line with transport strategy objectives Supporting the Transport and Projects Manager in organising technical staff and...

Principal EC&I Engineer   Certain Advantage are recruiting on behalf of our established Engineering client for a number of Principal EC&I Engineers on a contract basis to support important Nuclear projects in the UK.   They require EC&I professionals to Guide EC&I engineering teams in providing innovative solutions for complex projects and who can offer strong proficiency in EC&I project delivery with experience covering: Design Reviews: Serve as Lead Engineer overseeing design reviews, technical discussions, and formal evaluations. Mentoring: Mentor team members, set clear objectives, and promote a collaborative and high-performing environment. Optimisation: Work closely with Project Managers to ensure projects are delivered on schedule and within budget.Your background Working knowledge of BS EN 60909 Fault Calculations Working knowledge of power distribution modelling software Experience with Protection and control systems (11kV & 400V) Experience...

Principal Infrastructure Engineer +6 months + +DV cleared role - current active clearance is essential +Inside IR35 +£700 - £725 a day +On site in Yeovil We are seeking an experienced Principal Infrastructure Engineer to lead complex infrastructure projects and drive innovation within our organisation. This role offers a unique opportunity to shape the future of our technical architecture while collaborating with cross-functional teams to deliver scalable and reliable infrastructure solutions. Key Responsibilities: Lead the design, development, and implementation of enterprise-level infrastructure solutions, including networking, cloud services, and data centres. Provide technical expertise and mentorship to senior engineers and technical teams. Develop strategies for infrastructure scalability, security, and performance optimization. Oversee infrastructure migrations, upgrades, and maintenance activities with minimal disruption. Collaborate with stakeholders to define...

Principal Platform Engineer Location: Yeovil - fully onsite, open to condensed hours Duration: Until 27 Dec 2026 Rate: £99.08 per hour (Umbrella) IR35: Inside Clearance: Successful candidate must hold a minimum of DV (Developed Vetting) clearance. More information can be found here - National security vetting: clearance levels - (url removed) () Overview We're recruiting for a Principal Platform Engineer to join a Cyber & Security Solutions environment, taking ownership of secure platform engineering delivery across on‑prem, hybrid and cloud contexts. You'll act as a technical authority within a platform domain (e.g., virtualisation) and lead secure-by-design solutions for critical defence/government programmes. Responsibilities: Act as the technical authority in a platform engineering domain (e.g. virtualisation), providing specialist expertise to projects/programmes * Lead the design and implementation of secure platforms across on‑premise, hybrid, and cloud...

Senior Engineer (Highways & Active Travel) 📍 London Borough of Hackney 💰 £26.19 PAYE - £35.29 Per Hour 📄 Contract | Full-Time About the Role Hackney Council is looking for an experienced Senior Engineer to support the design and delivery of highways, active travel, road safety and public realm schemes across the borough. Working closely with the Principal Engineer, you will manage projects from concept through to implementation and contribute to the continued development of the Highways Service. Key Responsibilities Deliver traffic management, road safety, cycling, bus priority, school streets and public realm improvement schemes. Manage and progress highway and civil engineering projects. Review, respond to and resolve technical enquiries and complaints. Deputise for the Principal Engineer when required. Support project delivery, stakeholder engagement and public consultation. Supervise staff and contribute to team development where necessary. Ensure all projects...

Principal Platform Engineer - Ref: 1733 Initial contract until 27/12/26 £98.82ph, UMB, inside IR35 Yeovil - Full time onsite Please note, DV clearance is required for this positon and the programme will have "UK Eyes Only" restrictions. Your Impact Are you ready to take on complex technical challenges at the forefront of cyber and platform engineering? At Leonardo, our Principal Platform Engineers are hands-on experts who shape the design, integration, and delivery of secure platforms that keep our customers' missions running. Your work at Leonardo UK will see you take the lead in solving customer problems in an agile, innovative and team-centric manner. The role may involve a blended hybrid working model, with a mixture of working from home and working on site at one of our Leonardo offices to ensure close collaboration with the wider team and with our customers. Leonardo UK is seeking a Principal Platform Engineer to join the Cyber & Security Solutions Division...

Senior Engineer (Highways & Active Travel) 📍 London Borough of Hackney 💰 £42.00 per hour PAYE / £56.60 per hour Umbrella 📄 Contract | Full-Time About the Role Hackney Council is looking for an experienced Senior Engineer to support the design and delivery of highways, active travel, road safety and public realm schemes across the borough. Working closely with the Principal Engineer, you will manage projects from concept through to implementation and contribute to the continued development of the Highways Service. Key Responsibilities Deliver traffic management, road safety, cycling, bus priority, school streets and public realm improvement schemes. Manage and progress highway and civil engineering projects. Review, respond to and resolve technical enquiries and complaints. Deputise for the Principal Engineer when required. Support project delivery, stakeholder engagement and public consultation. Supervise staff and contribute to team development where necessary. Ensure...

The Opportunity PWHytek Ltd are currently recruiting for a Principal Nuclear Safety Engineer to support a major programme of work within the nuclear sector. This is an excellent opportunity to join a high-profile programme, providing specialist nuclear safety expertise across complex and highly regulated projects. The role is primarily remote, with occasional site visits required, offering flexibility while contributing to critical national infrastructure. The Role As a Principal Nuclear Safety Engineer, you will play a key role in the development and delivery of safety cases, ensuring compliance with regulatory requirements and supporting the safe design and operation of nuclear facilities. Working within a multidisciplinary engineering team, you will provide technical leadership and safety assurance throughout the project lifecycle. Key Responsibilities * Develop and review nuclear safety cases for complex engineering projects. * Provide technical guidance on nuclear...