Principal Mechanical Engineer - @One Alliance

Mott MacDonald Bentley are recruiting for a Principal Mechanical Engineer to join the Anglian Water @One Alliance. As part of Anglian Water’s @one Alliance, we are on a mission to create a sustainable and resilient future for water. With an ambitious £2.3 billion capital investment in AMP8, we are revolutionising infrastructure, sustainability, and digital transformation to protect the environment and support growing communities.

Your Purpose

As a Principal Mechanical Engineer within one of our four business units, 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.

About You

You will ideally have:

• 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.

What we can offer:

• At Mott MacDonald Bentley you will be offered a competitive salary which is commensurate based on your experience.
• Pension matched by employer up to 7%
• Option to purchase, sell and carry over annual leave
• Life assurance / Private Medical Insurance / Critical Illness Insurance and Health Screening options
• 26 weeks maternity leave, enhanced paternity and adoption leave/ Shared parental leave
• Payment of annual professional institution subscription costs
• Gym Membership discounts UK wide
• Cycle to work scheme, interest free season ticket loans and discounted dining cards also available

About Mott MacDonald

Mott MacDonald is a global engineering, management and development consultancy. Our purpose is to improve society by considering social outcomes in everything we do, relentlessly focusing on excellence and digital innovation, transforming our clients’ businesses, our communities and employee opportunities. A fundamental part of this is respecting each person’s differences and striving to meet their needs. Our values: progress, respect, integrity, drive, excellence. We believe that because we care about what we do, we do things better. We know that our people are our most valuable asset, so we are dedicated to investing in them, through our comprehensive training and development schemes, exposure to the wider design and build business and endless opportunities. We are committed to creating a workplace where our people are safe, have a voice, can reach their full potential, and everyone shares in the rewards. You’ll have the opportunity to contribute to projects that benefit our communities – from helping to secure water supplies for future generations to protecting homes and businesses from flood risk – our projects make a real difference.

Diversity, Equity & Inclusion

At Mott MacDonald Bentley we welcome applications from all sectors of the community. We are dedicated to building a diverse workplace where everyone feels included, has the opportunity to thrive, and is treated with respect. Even if you don’t meet every requirement for this role but are excited about the opportunity, we encourage you to apply. We are committed to ensuring that our recruitment practices are barrier-free and as inclusive as possible. This includes making adjustments during the job application process and throughout your future career with us.

Agile working

We are committed to providing a flexible and agile working environment that supports both our employees and the needs of the business.