Senior Mechanical Design Engineer

Carrington West; St Asaph; Hybrid; GBP 74,000 - 83,000; Full time

Job summary

Carrington West are seeking a Senior Mechanical Design Engineer with extensive knowledge of water and wastewater systems to support the AMP8 programme. The role is hybrid, based near St Asaph, with 1-2 days on site, and offers a challenging portfolio across design and technical assurance.

You will deliver mechanical designs across concept to preliminary stages, undertake condition assessments, and contribute to lifecycle cost studies while mentoring junior engineers.

Qualifications

• Degree-qualified in Mechanical Engineering or similar.
• Chartered status or working towards chartership with a relevant professional institution (e.g., IMechE) preferred.
• 5-10 years' post-graduate 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.

Responsibilities

• Deliver mechanical design solutions for water and wastewater treatment infrastructure.
• Provide 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.
• 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.
• Provide engineering advice and mentorship as required to junior members of the team.

Skills

Mechanical design

Water industry experience

Communication skills

Problem solving

Education

Bachelor's degree in Mechanical Engineering

Chartered status or working towards chartership (IMechE)

Job description

Job Title

Mechanical Design Engineer - Water Projects (AMP8 Framework)

Location

Hybrid 1-2 days a week in St.Asaph

Rate

£400 - £450 per day - Outside IR35 (Depending On Experience)

Duration

Initial 6-month contract with extensions available up to 2 years.

Start Date

ASAP

Overview

We are seeking a Senior Mechanical Design Engineer with strong experience in the water 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 the multiple Water regions. 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.
• 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.
• Provide engineering advice and mentorship as required to junior members of the team.

Requirements

• Degree-qualified in Mechanical Engineering or similar.
• Chartered status or working towards chartership with a relevant professional institution (e.g., IMechE) preferred.
• 5-10 years' post-graduate 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.