Senior Mechanical Design Engineer

Senior Mechanical Design Engineer – Water

Location: Chatham, Kent (flexible hybrid)

Job type: Long-term Contract (Outside IR35)

A leading water client is seeking an experienced mechanical design engineer to support long-term capital delivery programmes. This client-side position covers the full project lifecycle including feasibility, optioneering, detailed design, construction and commissioning.

Responsibilities

• Lead mechanical engineering design activities from feasibility through to commissioning on clean water infrastructure projects.
• Produce and review detailed mechanical designs, calculations, specifications, reports and drawings for treatment plant assets, pumped systems, pipework and chemical dosing equipment.
• Carry out and validate hydraulic calculations, including pump sizing, system curves, head loss assessments and surge considerations.
• Ensure design outputs comply with client standards, WIMES, CDM requirements and relevant industry legislation.
• Coordinate with multidisciplinary teams including process, civil, electrical and MEICA disciplines.
• Undertake site surveys, inspections, testing and commissioning support.
• Review contractor design submissions, ensuring technical accuracy, constructability and alignment with client specifications.
• Support project managers by contributing technical input to project documentation, programme development and delivery planning.
• Maintain strong working relationships with internal teams, stakeholders and framework partners.

Requirements

• HNC/HND or degree in mechanical engineering or equivalent.
• Demonstrated experience delivering mechanical design within water or utilities projects, ideally including treatment and clean water infrastructure.
• Strong capability in producing and reviewing mechanical calculations, specifications and technical reports to senior engineer level.
• Knowledge of WIMES, water treatment processes, pumping systems, hydraulic analysis and industry standards.
• Ability to work autonomously, manage competing priorities and deliver high-quality outputs across multiple live projects.
• Effective communication and collaboration skills for multidisciplinary coordination.
• Full UK driving licence for travel across client's supply area.

This is an excellent opportunity to join a major water client delivering essential infrastructure projects. It offers stability, flexibility and the chance to contribute across the full project lifecycle while working within a supportive, multidisciplinary environment.