Mechanical Engineer - Water

MWH Treatment; Cambridgeshire and Peterborough; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading water sector solution provider is seeking a Senior Mechanical Engineer in Peterborough. You'll lead mechanical designs, collaborate with stakeholders, and mentor junior engineers. Candidates must have a degree in Mechanical Engineering and experience in mechanical design, preferably in the water sector. This role offers opportunities for some home working and is committed to diversity and inclusion.

Qualifications

• Proven experience in mechanical design, ideally in the water sector.
• Strong understanding of industry standards and health and safety legislation.
• Passion for coaching and mentoring others.

Responsibilities

• Lead and review mechanical designs for safety and compliance.
• Collaborate with stakeholders to deliver projects on time and budget.
• Mentor junior engineers and cultivate a culture of technical excellence.

Skills

Leadership

Mechanical design

Collaboration

Health & Safety

CAD software

Education

Degree in Mechanical Engineering

Chartered status (or working towards)

Tools

Engineering software

Job description

MWH Treatment is looking to strengthen their Engineering team with a Senior Mechanical Engineer. Based at our office in Peterborough with some home working. As our new Senior Mechanical Engineer, you'll be at the forefront of designing and delivering innovative water solutions. You'll lead technical delivery, drive sustainable and cost-effective design decisions, and guide junior engineers to deliver work that's safe, future-proof, and built to last.

What You'll Be Doing

• Lead and review mechanical designs to ensure compliance, safety, and performance excellence.
• Collaborate with stakeholders to deliver projects on time, within budget, and to high quality standards.
• Promote the use of digital tools and modular construction techniques.
• Drive Health & Safety by design, identifying improvements and reducing whole-life costs.
• Champion sustainability, carbon reduction, and innovation across the design lifecycle.
• Mentor junior engineers and create a culture of technical excellence and continuous learning.
• Work closely with project and engineering leaders, contributing to strategic decisions.

Qualifications

• A degree in Mechanical Engineering (or related discipline).
• Preferably chartered, or working towards chartered status.
• Proven experience in mechanical design—ideally in the water sector or similar complex infrastructure environment.
• Strong understanding of industry standards, health and safety legislation, and construction principles.
• Leadership experience with a passion for coaching, mentoring and developing others.
• Proficiency in CAD and engineering software.
• Confident decision-maker, with a collaborative mindset and strong communication skills.

MWH Treatment is an integrated design and build solution provider operating in the water sector. We have over 1,000 staff working across eight regional centres, primarily supporting six long‑term water sector frameworks operating both as MWH Treatment and increasingly in joint ventures and alliances.

At MWH Treatment we create opportunity by inviting, embracing and celebrating difference. Our goal as an employer is to recruit, motivate, and develop our employees with diverse ranges of talents and perspectives to ensure that we have the breadth of viewpoints, experiences, and skills needed to succeed. Embracing diversity of all kinds enables MWH Treatment to provide a work environment and culture that play a key role in attracting and retaining the right people with the right skills. Living these values and committing to diversity and inclusion supports and enhances our employees and acts as a key differentiator in the market. We are signed up to the Armed Forces Corporate Covenant in making a promise to support our forces. We are working with CTP to help ex veterans find work in the civilian world.