21 senior infrastructure engineer jobs found

Senior Infrastructure Engineer £450 Per Day, Inside IR35 6-Month Contract Didcot, Oxfordshire Your new company We're supporting a nationally significant scientific research organisation recognised for delivering some of the most advanced and high-impact projects in the UK. Their digital platforms underpin cutting-edge experiments, secure collaboration and large scale data processing, and they rely on a modern, resilient infrastructure estate to keep these environments running safely and efficiently. As part of their ongoing investment in core services, they are seeking an experienced Senior Infrastructure Engineer to maintain, support and enhance their Microsoft 365, server, storage and authentication systems. This is a place where your technical expertise will directly contribute to work used across the UK science and innovation landscape. Your new role You'll take responsibility for the hands-on support and maintenance of both on-premise and cloud-based infrastructure....

Mechanical Engineer / Senior Mechanical Engineer - Contract (Inside IR35) Warrington (Hybrid - 3 Days Onsite) £51-£56 per hour Long-Term Contract | Major Nuclear Programme - PFDO, Sellafield Are you a Mechanical Engineer ready to step into a high-impact role on one of the UK's most critical nuclear programmes? We're supporting a key delivery partner on the PFDO project at Sellafield, and we're looking for a Mechanical Engineer or Senior Mechanical Engineer to help drive engineering excellence across complex, safety-critical work. The Opportunity You'll play a vital role in delivering engineering and technical activities across the project lifecycle-bringing your expertise to solve complex challenges and ensure high-quality outputs in a regulated environment. This is a fantastic opportunity to work on a flagship nuclear programme, collaborating with experienced teams while contributing to the safe and efficient delivery of major works. What You'll Be Doing Deliver...

6‑month Senior Network Engineer contract in Didcot, £480 per day, supporting a large, complex network estate for a major UK scientific organisation. £480 + VAT per day 6‑month Contract (Inside IR35) - Umbrella only Didcot, Oxfordshire, UK - Hybrid (3 days onsite, non‑negotiable) Your new company We're partnered with a nationally important research organisation whose work powers major scientific breakthroughs and supports a wide range of innovative programmes across the UK. Their network infrastructure is essential to enabling collaboration, high‑performance computing, data exchange and secure connectivity across multiple sites. With continued investment in their digital estate, they are now looking for a Senior Network Engineer to help maintain, secure and evolve the organisation's core network services. This is a role where your engineering expertise will directly contribute to research and infrastructure used on a national and international scale. Your new role You will be...

Job Title: Senior Civil Engineer Day Rate: Up to £500 per day (outside IR35) Location: Manchester, with occasional site visits (expenses paid) Type: 12-month Contract | Full-time | Hybrid (1-2 days WFH possible for the right candidate) About the Role: You'll be involved in varied and high-impact projects across the regulated water industry, including: Sewage treatment works upgrades Clean water main replacements IED schemes at sewage treatment works CSO upgrades and storm storage solutionsThis is a chance to deliver technical excellence on essential UK infrastructure. About the Client: Our client is a respected engineering design consultancy working across the UK rail and utilities sectors. With a growing workload and strong reputation, they offer a supportive and collaborative team culture. Wellbeing is central to their values - they've created a safe, fair, and positive environment where people thrive. Key Responsibilities: Deliver high-quality civil engineering design...

Contract | Inside IR35 | 6 months Location: Manchester preferred (hybrid, flexibility offered) Security clearance SC clearance is required Active SC is preferred, though candidates with lapsed but transferable SC may be consideredThe opportunity We're looking for a hands‑on Lead Technical Architect with a strong engineering background to help design, build and evolve cloud‑native platforms used by other developers. This is not a strategy‑only architecture role. You'll work closely with engineers, contribute to codebases, and lead architectural decisions by building and delivering real systems. If you're an engineer at heart who's progressed into architecture - or a technical architect who still codes - this role is likely to suit you well. What you'll be doing Designing and building scalable, secure, cloud‑native platforms on AWS Working directly alongside engineers, writing and reviewing production code Defining and implementing serverless architectures in large,...

Sub Agent Rail & Civil Engineering (Bryn Station Project) 9 month contract opportunity Rate: £400 - £425 per day (Inside IR35 - Umbrella PAYE) We are seeking an experienced Sub Agent to take ownership of a key package of works on the Bryn Station accessibility upgrade project, specifically focused on the installation of a lift shaft. This role sits at the intersection of civil engineering, rail infrastructure, and temporary works, requiring strong leadership on-site alongside solid technical expertise. You will play a pivotal role in coordinating delivery, ensuring engineering compliance, and driving programme performance within a constrained rail environment. Responsibilities: - Lead and manage a section of works from planning through to successful delivery - Drive site operations, ensuring productivity, safety, and quality targets are met - Interpret and implement engineering drawings, specifications, and technical requirements - Coordinate with designers,...

Job title: Senior Software Engineer in Test (D) Location: Manchester Duration: 11 Months (rolling) Hourly rate: £57.00ph INSIDE IR35 (Via Umbrella Solutions) POSITION DESCRIPTION: A Senior Software Engineer in Test with a passion for quality, and proven experience of automated software testing, is required for a variety of digital projects being delivered for Luxury Automotive client based in Manchester. We are looking for great engineers who have a passion for innovative problem solving, quality-first coding and practicing Continuous Integration. Would you thrive in an exciting, dynamic and creative start-up environment, but also enjoy the security, resources and influence of an established and successful organisation? Would you excel within a world-class and passionate team that loves what they do? Are you passionate about mentoring and sharing your skills with fellow engineers? You will form part of a collaborative, iterative and agile process in a multi-disciplined team helping...

Process/Senior Process Instrument Design Engineer- Nuclear (Contract) Warrington (Hybrid - 3 days on site) £46-£51/hour (Inside IR35) | Up to £56/hour for Senior Candidates 37 hours over 4½ days per week We're supporting a key nuclear programme and are looking for a Process Instrument Design Engineer to join the Silos PFCS Supporting Projects E&I design team. This is a fantastic opportunity to work on high-profile, safety-critical projects where your expertise will directly contribute to complex engineering solutions. The Role You'll be responsible for delivering and checking high-quality design packages, ensuring they meet safety, functional, and business requirements across the project lifecycle. You will: Deliver process instrumentation design from concept through to handover Support and collaborate with multidisciplinary engineering teams Review and check design documentation Provide technical support to construction and commissioning activities Mentor and support...

SPEN are looking for a Senior Engineer to join them on contract basis, based in Prenton. Role: Senior Engineer Business: Scottish Power Energy Networks Duration: 12 month initial contract Location: Prenton, CH43 3ET Rate: Inside IR35, Umbrella and PAYE options available Role The position of Senior Engineer (Delivery) sits within SP Energy Networks 132kV Projects team delivering our RIIO-ED2 business plan. In this role you will manage personal objectives to ensure the safe and timely delivery of the department work programme including design, planning and construction. Assist in the statutory obligations of the department by developing solutions and work programmes. What you’ll be doing Contribute to the development / delivery of a portfolio of complex capital projects, ensuring safety, environmental compliance, and adherence to budget, quality, and timelines. Drive performance and efficiency by identifying and implementing innovation, value...

Contract Senior Structural Engineer London | Immediate Start | Up to c£50 p/h | 6-Month Rolling Contract | Inside IR35 Are you a highly experienced Structural Engineer ready to make your mark on a landmark international project? A leading global engineering consultancy based in Central London is seeking a Contract Senior Structural Engineer to join their team immediately, playing a key role in the delivery of a major overseas airport development. This is a fantastic opportunity to work on a technically complex, high-profile infrastructure project within a fast-paced, collaborative environment. You will provide critical design input on a prestigious international airport project, contributing to large-scale structural solutions that demand precision, creativity, and technical excellence. We are looking for a senior-level professional with: * 8–10+ years’ building structures design experience * Strong technical expertise in steel and reinforced concrete (RC) design *...

Location: Bridgwater site based - 3 days per week and 2 days remote working/satellite office Status: Contract - Inside IR35 Duration: Currently approved thro to 31dec26 (renewable) Reports to: JDO Area Lead Morson Edge are working on behalf of a major player within the Energy Sector who have a current (contract) requirement for an Engineering Coordinator, to join their established site-based team in Somerset. This is a uniquely interesting opportunity to contribute towards one of Europe's largest infrastructure/construction Projects. If you're looking for a challenge and have the enthusiasm and exceptional stakeholder management skills this role will require, this could be the role for you! The Opportunity As an Engineering Coordinator, you will ensure delivery of on-site engineering issues and changes within your designated area. You will be the driving force behind ensuring the successful completion of all pending tasks and construction updates within your assigned (site)...

Senior Revit Designer - Civil, Structural & Architectural (CS&A) Contract | £36-£41/hour (Inside IR35) Warrington | Hybrid - 3 days per week in the office Security: Sellafield experience and existing PP Pass is essential. We are seeking an experienced Autodesk Revit Designer to support engineering design delivery within a highly regulated environment. This role will focus on the development and modification of Civil, Structural & Architectural (CS&A) and mechanical piping elements within a Revit model, supporting asset care and infrastructure upgrades. Working within a multi-disciplinary engineering team, you will contribute to the production of design deliverables including drawings, layouts, and engineering documentation, ensuring solutions are safe, compliant, and delivered to agreed time, cost, and quality targets. The role is primarily office-based in Warrington (3 days per week) with occasional site visits and travel to other offices when required. Key...

EC&I Engineer - Sellafield Projects £46-51 per hour (Inside IR35) On-site - Sellafield Sector: Nuclear Are you an EC&I Engineer looking for a hands-on, site-based role on one of the UK's most complex and nationally significant nuclear sites? This is a strong opportunity to join a multidisciplinary engineering team delivering critical EC&I design and engineering solutions across Sellafield projects. This role is fully site-based, ideal for engineers who enjoy being close to construction, commissioning, and real-time engineering challenges in a highly regulated environment. Key Responsibilities Deliver and support EC&I engineering activities across nuclear infrastructure projects Produce and review design documentation, drawings, and calculations Ensure EC&I designs comply with Sellafield standards, safety case requirements, and site licence conditions Interface closely with construction, commissioning, safety, and project teams to support effective delivery...

CE&I Safety System Design Engineer Silos MSSS SEP 1 & 2 | Nuclear & High-Hazard Environment Warrington Hybrid - 3 days on site £51-£56/hour | Inside IR35 Are you a CE&I Safety System Design Engineer looking to make a real impact on nationally significant infrastructure? This is a high-profile opportunity to join the Silos MSSS SEP 1 & 2 programme, working at the heart of safety-critical design in a complex, regulated environment. You'll be part of a specialist CE&I design team, delivering and checking Safety System design packages that underpin safe operations - while also supporting commissioning activities and mentoring the next generation of engineers. The Role You'll play a key role in: Delivering and checking CE&I Safety System design packages to meet safety, functional and business requirements Supporting and reviewing designs produced by other engineers within the team Working across disciplines to ensure compliant, integrated solutions...

Job Title: Lead Civil Engineer Rate: £50 - £60 per hour (dependent on experience) Location: Birmingham / Glasgow / Chester / Leeds (Flexible UK base / hybrid) Type: Contract - Inside IR35, Hybrid About the Role: Our client is seeking Lead Civil Engineers to join their Delivery group, working on non-infrastructure UK water engineering projects. You will act as a technical specialist and/or in a lead role, developing and applying advanced engineering techniques, while guiding project teams to deliver high-quality outputs. About the Client: Our client is part of a global engineering and environmental group, delivering projects in over 100 countries. They combine innovation, sustainability, and technical excellence, offering employees opportunities to work on exciting projects worldwide while supporting flexible and hybrid working patterns in the UK. Key Responsibilities: Provide guidance on design guides, standards, systems, and engineering codes. Prepare calculations and...

I'm currently working with a client within the UK water sector that is looking to hire a Principle Civil Engineer at design level. This is a hands-on engineering design roles focused on water and wastewater treatment projects, supporting the delivery of cost effective and buildable technical solutions within a multi-disciplinary environment. Typical responsibilities include: Producing and developing civil engineering design layouts for water/wastewater infrastructure Working closely with other disciplines including MEICA and process teams Ensuring designs meet technical standards, safety requirements, and constructability expectations Supporting project delivery from concept through to detailed design Desirables: 8 -10 year's experience within the UK water sector Experience in civil design within water and sewage treatment A strong understanding of plant layout and infrastructure design The ability to work effectively in a multi-disciplinary engineering environment...

Hays are now looking for a Customer Network Design Specialist for one of our local clients: £465 p/d Inside IR35 Hybrid - Location is Exeter 6 Month Initial Contract NPPV3 As a Customer Solution Design Practitioner, you'll shape secure, nonperformance technology solutions for customers across critical national services and large enterprise networks. Working closely with design teams, engineers and stakeholders, you'll deliver robust, scalable solutions that support complex transformation programmes. What You Will Be Doing Designing technical components that meet agreed time, cost and quality standards. Producing design packages for transitions, transformations and in‑life improvements. Collaborating with solution designers, architects and technical specialists. Managing technical and commercial risks and resolving issues proactively. Presenting solution options, explaining design decisions and business benefits. Identifying opportunities for service improvement or solution...

Principal Substation Primary (HV Plant) Design Engineer Location: Glasgow, Leeds, Birmingham, or Epsom Duration: 12 months initially Rate: Negotiable on experience Inside IR35 Are you ready to take your engineering career to the next level and make a real impact in the energy sector? Our client, a leading organisation in power infrastructure, is hiring for a Principal Substation Primary (HV Plant) Design Engineer to join their dynamic team. This is a fantastic opportunity to work on diverse projects within the transmission and distribution sectors across the UK, supporting innovative energy solutions. What you'll be doing: * Lead FEED and detailed design workstreams for HV substations, ensuring technical excellence and compliance with client specifications. * Manage and mentor a team of engineers, supporting their development and performance. * Oversee design reviews, including layouts, earthing, interlocking schemes, and HV equipment specifications. * Coordinate project...

Project Support Location: Gloucestershire Contract: 6-month contract with potential for extension Hours: Full-time Salary: £26.67 p/h (umbrella) / £20 p/h PAYE IR35: Inside About the Position We're looking for a proactive Project Support professional to join a dynamic project portfolio based in Gloucestershire. Working on site as part of a small, varied team, you'll collaborate closely with project engineers as well as facilities and health & safety colleagues. A solid grasp of project administration-such as action tracking and budget monitoring-is essential, along with experience thriving in a fast‑moving environment. Project Landscape You'll contribute to a broad mix of projects, including: * Relocation of operational departments to enable site expansion * Small civil engineering works (£100k-£750k) * Operational enhancements to increase capacity * Mechanical and electrical infrastructure upgrades * Procurement, installation, and commissioning of process...

Lincolnshire based Site Agent - inside IR35 I'm currently looking for a Site Agent to support on my client, on the technical set up and delivery of major infrastructure in the Power sector. This is a freelance, site based role where you will need to be based from 3 different locations all 1 hour - 1 hour 20 from Lincolnshire. You'll provide technical construction of the civil engineering of a major power upgrade project whilst being supported by a team of Engineers you will deliver: utility diversions, temporary works, drainage, haul roads, compounds, OHL. Ideal experience is someone who can be technically responsible for the project and have a background in enabling works, Civil Engineering or Structures We are looking for candidates who can interview this week and start on circa 1 weeks notice. Roles and responsibilities: Providing buildability and construction input into the detailed design completed by the Lot 1 designers clearing the way of all constraints to allow the...