8 principal mechanical design engineer jobs found

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...

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...

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 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...

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...