Senior Mechanical Engineer

About the role

Senior Mechanical Engineer - Balfour Beatty (@one Alliance)

Location:

Peterborough/ Hybrid (2–3 days on site/with stakeholders)

Balfour Beatty play a key role as part of the { (6) Anglian Water's @one Alliance:
Overview | Linked In} @Anglian Water’s one Alliance. The Alliance is a ground‑breaking collaboration between Anglian Water and eight industry‑leading partners:
Balfour Beatty, Barhale, Binnies, MMB, MWH Treatment, Skanska and SWECO. And together, we deliver around 40% of Anglian Water’s capital investment programme.

As we enter AMP8, our most ambitious Asset Management Period yet, we’re taking on nature‑based, sustainable solutions like wetlands and urban drainage schemes. We’re setting global benchmarks in environmental infrastructure and empowering our people with exceptional career growth opportunities.

As a Senior 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.

• 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.

• 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

Depending on your skills, experience, and interests, you could be aligned to one of our four business units:

The Place Based Thinking team delivers some of the largest and most complex projects across the @one Alliance. Made up of six Senior Project Manager teams, we oversee 19 catchments, covering key sites such as Whitlingham, Flag Fen, Great Billing, Cotton Valley, Bedford, Colchester, and Ipswich Cliff Quays. These projects involve managing all parts of the network from rising and gravity mains, pumping stations, high spilling overflows, and water recycling centres.

The Water Business Unit provides strategic support across the clean water network, covering both system performance and infrastructure planning. We assess the future hydraulic state of the network in response to population growth and increased demand, support the design and delivery of capital and infrastructure schemes to ensure hydraulic resilience, and work with optimisation teams to enhance overall network efficiency.

Our Water Recycling Business Unit, split into East and West regions, is responsible for the collection, conveyance, and treatment of wastewater across an extensive network. We operate over 76,000km of sewerage infrastructure and 1,163 treatment centres, ensuring safe and sustainable discharge to the environment while driving innovation and environmental performance.

Day in, day out, our teams deliver some of the UK’s most ambitious, exciting and meaningful projects; developing, building and maintaining the vital infrastructure that supports national economies and strengthens communities.

• Smart working, giving you more flexibility such as staggered start and finish times, with up to 40% remote working,…