Principal Mechanical Engineer - Water Sector St Albans: Hybrid (3 Days Office) Contract: 55-65p/h (Outside IR35) Advance TRS are supporting a rapidly growing consultancy in their search for a Principal Mechanical Engineer. Joining a newly formed London business unit, you'll have the unique opportunity to help build a team from the ground up, influence how projects are delivered, and play a significant role in the future growth of the business within the UK water market. You'll lead the mechanical design of clean water and wastewater projects, producing high-quality engineering solutions while mentoring junior engineers and coordinating multidisciplinary design teams. Key Responsibilities: Deliver mechanical design solutions for water and wastewater projects Produce calculations, reports, specifications and design drawings Lead and review work from junior engineers and CAD technicians Coordinate with suppliers, manufacturers and subcontract design teams...

Job Title: Senior / Principal Civil Engineer Salary: Dependent on experience Location: St Albans (Hybrid - minimum 3 days office-based) Type: Permanent or Contract (Outside IR35 available) - Hybrid About the Role: Our client is seeking experienced Senior and Principal Civil Engineers to join a multidisciplinary design team delivering projects across the regulated water sector. These opportunities are suited to engineers with strong design experience within water and wastewater who enjoy solving complex engineering problems, developing practical solutions and contributing to the successful delivery of projects. Depending on experience, you will take ownership of technical delivery, support multidisciplinary design teams and contribute to maintaining high standards of engineering quality and compliance. Principal-level candidates will also provide technical leadership and mentoring support across the team. Working closely with senior management and project teams, you...

Lead Test Engineer - Inside IR35 - 600 to 640 per day via umbrella - 12-month contract - SC Clearance is essential (Experience in driving or supporting transformation from monolithic systems to distributed micro-services architectures in Java - is essential) Start date - 25/05/2026 is essential Leeds or Manchester based - in the office not home based Essential Skills & Experience: Technical Expertise: Strong experience designing and implementing test strategies for microservices environments Hands-on automation experience using: o Java, Selenium, Rest Assured o API, contract, and integration testing ( Experience working with monolith and microservices systems is essential) Knowledge of: o CI/CD pipelines o Spring Boot-based applications o Performance testing fundamentals Modern Testing Practices: o Contract testing, API testing, and asynchronous messaging (e.g. Kafka) o Non-functional testing (performance, accessibility) Experience...

Role: Nuclear Safety Engineer Support Position: Contract Location: Hybrid between HPC site, Aztec West, Home. Days per week: 3 days per week/ 19 hours per week Duration: 12 Months Rolling Rate: Circa 300 p/d PAYE + 36 days annual leave Circa 405 p/d Umbrella Job Purpose / Overview As a Nuclear Safety Engineer Support , you will need to support the development of the Operational Nuclear Safety capability for Hinkley Point C (HPC). This will include input during design, construction, commissioning, and the preparations for operation. The Nuclear Safety Engineer will support the project to ensure that nuclear safety requirements are met and will strive to achieve world best practices identified by bench marking with other industry leaders and industry programmes. Principal Accountabilities Supporting the maintenance and development of the Operational and Hazard technical specifications by providing safety case expertise and advice Overseeing implementation of the...

Role: Project Manager (Civils) Position: Contract Location: Leiston / hybrid Days on Site: 3 days Duration: Approx until 31st Dec 2026 Pay: up to 484 PAYE - 700 Umbrella The Civil Works Programme comprises a series of projects that will be delivered over a 10-year period. Each element of the scope has been assigned to a combination of participants that will be responsible and accountable for the delivery. The Civils Programme will deliver the Sizewell C Civil Engineering scope to support the MEH erection in the Nuclear, Conventional and Heat Sink islands. The Civil Works Programme is responsible for delivering: Enabling and Earthworks: sea defences, access facilities, civil engineering work to support site establishment, diaphragm walling around the nuclear plant footprint, dewatering, excavation and earthworks. Tunnelling and Marine: beach landing facility, jetty, shafts and intake and outfall tunnels for the nuclear plant cooling systems. Main civil...