Job Description

Costain is working closely with Severn Trent Water on their Capital Delivery Framework, as part of it's capital programme for AMP8. As part of the Design and Build Framework lot, Costain brings together its design, construction, and consultancy expertise to undertake renewal and refurbishment projects and will assist Severn Trent in its target to make continuous improvements to its safety performance, whilst ensuring continuity of supply and consequently lowering costs for its customers.

The Mechanical Project Engineer is responsible for the delivery of mechanical packages across our water and wastewater projects, ensuring they are completed safely, on time, within budget, and to the required quality standards. This role involves leading early-stage mechanical design integration with the supply chain and delivery team, translate designs into procurement packages and serve as the mechanical package lead for subcontractors as projects move from design phase into manufacturing and site delivery, installation and commissioning.

Responsibilities

Early-Stage Design & Integration

• Lead the integration of internal mechanical design with specialist third-party supplier designs (e.g., aeration systems, pumps, various mechanical package plant, chemical dosing, inlet screening, valves, and Washwater systems)
• Critically review P&IDs, 3D models (BIM), and general arrangement drawings and feedback comments to the 3rd party designers through the design management function, as well as managing collaborative design between 3rd party designers and supplier design functions
• Ensure all designs meet UK water industry standards (WIMES), and specific client (STW) specifications

Design-to-Procurement Management

• Translate design/datasheets into robust technical tender documents. You will ensure that mechanical specifications are precise, correct, and work closely with the commercial teams to initiate subcontract engagement and delivery
• Assist in the technical evaluation of subcontractor bids, identifying potential technical risks or "scope gaps" in vendor proposals before they are onboarded
• Identify and specify critical mechanical assets early to secure manufacturing slots and protect the project programme, working closely with the PM function to manage the procurement schedule proactively

Subcontractor & Package Management

• Act as the primary point of contact for mechanical subcontractors. You will manage their design finalisation post-award, ensuring their "as-manufactured" drawings align with the requirements of the design team
• Manage mechanical packages proactively, you will ensure Subcontractors work to programme and implement robust planning of works alongside the site teams, as well as monitoring the scope of works, ensuring any change from the original design are technically assured, and commercially justified under NEC3/4 contract terms
• Work with the MEICA team, where required to attend Factory Acceptance Testing (FAT) and quality inspections to verify that the physical mechanical assets match the approved design prior to delivery to site

Qualifications

Essential

• Degree/HND/HNC in Mechanical Engineering or related discipline
• Chartered Engineer status (or working towards) preferred
• Proven experience in mechanical package management within the water or wastewater sector, with a deep understanding of hydraulics, pumping systems, package plant and pipework
• Strong understanding of treatment processes and mechanical systems
• Experience managing suppliers and subcontractors
• Strong project management and organisational skills
• Excellent communication and stakeholder management abilities
• Commercial awareness and contract understanding
• Problem-solving mindset with attention to detail
• Proficiency in reviewing 3D/BIM environments and AutoCAD
• Valid CSCS / EUSR water hygiene card

Desirable

• Experience with major infrastructure or utility projects
• Knowledge of relevant standards (e.g., BS, ISO, water industry specifications)
• Familiarity with NEC or similar contract forms

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About Us

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