Mechanical Design Engineer

Senior/Principle Mechanical Design Engineer – Water Projects (AMP8 Framework)

Location: Roles across the midlands (hybrid working)

Rate: GBP60 p/h – Outside IR35/LTD Company (all in)

Duration: 12Months+/Ongoing

Industry: Water/Wastewater treatment (Must have 10+ years experience in this field)

Positions: 2–3

Overview

We are seeking Senior & Principle Mechanical Design Engineer's with strong experience in the water/wastewater sector to support high–profile projects as part of the AMP8 investment programme. This role is embedded within a multidisciplinary engineering team and focuses on delivering design and technical assurance for water and wastewater treatment schemes across multiple Water/wastewater authorities.

This is a fantastic opportunity to contribute to long–term, sustainable water infrastructure improvements through technically rewarding project work in a flexible and collaborative setting.

Key Responsibilities

• Deliver mechanical design solutions for complex water and wastewater treatment infrastructure.
• Provide engineering input across all design stages – including concept, feasibility, optioneering, and preliminary design.
• Carry out condition assessments, asset surveys, and root cause analysis for plant and equipment failures.
• Detailed design and mechanical calculations for multiple processes attached to Water/Wastewater treatment facilities
• Contribute to whole–life cost analysis, project briefs, and technical reports.
• Work collaboratively with multidisciplinary teams to resolve mechanical challenges on operational assets.
• Ensure all solutions are technically robust, compliant with regulations, and aligned with best practices in the water industry.
• Support project delivery and commissioning phases through technical review and assurance.

Requirements

• Degree–qualified in Mechanical Engineering
• Chartered status or working towards chartership with a relevant professional institution (e.g., IMechE) preferred.
• 10 + years' Water/Wastewater experience.
• Experience delivering mechanical design work in the Water/Wastewater industry.
• Familiarity with AMP7 or AMP8 frameworks
• Strong communication skills and a proactive, solution–oriented approach to engineering delivery.

Desirable Background

Candidates who have previously worked on frameworks for UK water utilities such as:

• Thames Water
• Wessex Water
• Welsh Water
• Northern Ireland Water
• Anglian Water
• Severn Trent
• United Utilities
• Southern Water
• South West Water
• Northumbrian Water

will be at a distinct advantage.

If you're an experienced mechanical engineer looking to apply your expertise to vital UK water infrastructure projects, we'd love to hear from you.