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Mechanical Engineer
Costain Group
Source: Headcount Labs · original listing ↗
Job data: Headcount Labs, ODbL 1.0. Job descriptions belong to their employers.
Source date: 10/30/2026
About this role
Job Description Costain have won extensive work across the water sector to support the AMP 8 investment cycle. We have been appointed by Northumbrian Water to the Living Water Enterprise to help shape and deliver its strategic infrastructure upgrade programme with contracts valued up to c.£670m to Costain over 15 years. We are looking for an experienced Mechanical Engineer to join the Framework team and drive quality delivery. The Mechanical Site Engineer will support the successful delivery of mechanical engineering and installation activities across water and wastewater infrastructure projects. Working closely with the Site Manager, Project Engineer, Mechanical Engineers, subcontractors and client teams, the role will ensure mechanical works are delivered safely, efficiently, to programme and in accordance with design, quality and environmental requirements. The role will involve working across water treatment works, wastewater treatment works, pumping stations, reservoirs and associated infrastructure. Manage and coordinate mechanical installation activities on site in accordance with approved drawings, specifications and project requirements. Supervise mechanical subcontractors and site teams, ensuring work is completed safely, efficiently and to the required quality standards. Interpret and work from mechanical drawings, specifications, schedules and construction documentation. Coordinate mechanical works with civil, electrical, ICA and commissioning activities. Monitor progress against the programme and identify potential delays, constraints and technical issues. Liaise with Project Engineers, Design Engineers, Site Managers, subcontractors and the client to resolve engineering and construction issues. Undertake site inspections and ensure installations comply with design, specification and relevant standards. Support the preparation and review of method statements, risk assessments, inspection and test plans and permits. Ensure materials, plant and equipment are available and suitable for the planned works. Monitor quality of installation and ensure inspection and testing requirements are completed and recorded. Assist with commissioning, testing and handover of mechanical systems and equipment. Identify defects, coordinate remedial works and ensure issues are closed out effectively. Maintain accurate site records, including progress reports, quality documentation, drawings and technical queries. Support the management of health, safety, environmental and quality requirements on site. Contribute to toolbox talks, site briefings and continuous improvement initiatives. Build effective working relationships with clients, suppliers, subcontractors and internal project teams. Knowledge, Skills and Experience Essential Experience working as a Mechanical Site Engineer, Mechanical Engineer or similar construction/site-based role. Experience delivering mechanical works within a construction, infrastructure, utilities or process environment. Good working knowledge and experience on Phosphorus Removal schemes Understanding of mechanical installation, testing and commissioning. Ability to interpret engineering drawings and technical specifications. Good understanding of construction health and safety requirements. Strong communication and coordination skills. Ability to manage priorities and work effectively to programme. Competent in producing and maintaining site documentation and records. Ability to identify and resolve technical and construction issues. Desirable Experience within the UK water or wastewater sector. Experience working on AMP programmes or water company projects. Relevant engineering qualification such as HNC/HND or degree in Mechanical Engineering. CSCS or equivalent site qualification. Temporary Works, SSSTS/SMSTS or similar site-based qualifications. Experience with NEC contracts. Experience of commissioning and handover of mechanical process equipment. LI-AL1 Costain helps to improve people’s lives with integrated, leading edge, smart infrastructure solutions across the UK’s energy, water, transportation and defence markets. We help our clients improve their business performance by increasing capacity, improving customer service, safeguarding security, enhancing resilience, decarbonising and delivering increased efficiency. Our vision is to be the UK’s leading smart infrastructure solutions company. We will achieve this by focusing on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments, legislation or essential performance requirements. We offer our clients leading edge solutions that are digitally optimised through the following five services which cover the whole lifecycle of their assets: future-shaping strategic consultancy; consultancy and advisory; digital technology solutions; asset optimisation and complex programme delivery. Our culture and values underpin everything we do. Costain appreciate the time and effort taken when applying for one of our positions but, due to the high volume of responses, we are unable to provide individual feedback on candidates at application phase. We do share individual feedback following an interview. A Disability Confident employer will generally offer an interview to any applicant that disclose they have a disability and meets the minimum criteria for the job as defined by the employer. It is important to note that in certain recruitment situations such as high-volume, seasonal and high-peak times, the employer may wish to limit the overall numbers of interviews offered to both disabled people and non-disabled people. For more details please go to the Disability Confident website: https://www.gov.uk/government/collections/disability-confident-campaign Job Info Job Identification 103513 Job Category Operations Engineering Posting Date 10/30/2026 Job Schedule Full time Locations County Durham, United Kingdom Newcastle Upon Tyne, Tyne and Wear, United Kingdom (On-site) Contract Type Permanent Driving Required Yes Security Clearance Required No