Senior Mechanical Engineer – Water

MWH Treatment Limited; Peterborough; Hybrid; GBP 40,000 - 60,000; Full time

Job summary

A leading company in engineering solutions is seeking a Senior Mechanical Engineer based in Peterborough. You will lead mechanical designs for projects in a complex infrastructure environment, mentor junior engineers, and promote sustainability and innovation. Ideal candidates will have a degree in Mechanical Engineering, strong mechanical design experience, and proficiency in CAD software. This role allows for some home working.

Qualifications

• A degree in Mechanical Engineering or related discipline.
• Proven experience in mechanical design in complex infrastructure environments.
• Strong understanding of industry standards and construction principles.
• Leadership experience with a passion for mentoring others.
• Proficient in CAD and engineering software.
• Strong communication and collaborative skills.

Responsibilities

• Lead and review mechanical designs to ensure compliance and excellence.
• Collaborate with stakeholders to deliver projects on time and within budget.
• Promote digital tools and modular construction techniques.
• Drive Health & Safety improvements through design.
• Champion sustainability and innovation in designs.
• Mentor junior engineers and promote technical excellence.

Skills

Mechanical design

Project management

Leadership

CAD proficiency

Communication

Education

Degree in Mechanical Engineering

Tools

Engineering software

Job description

Overview

MWH Treatment is looking to strengthen their Engineering team with a Senior Mechanical Engineer. Based at our office in Peterborough with some home working.

Responsibilities

• 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.