Senior Mechanical Engineer

Senior Mechanical Engineer
Location: Peterborough | Hybrid working available
Who are we?
The @one Alliance is a collaborative partnership between eight industry leaders – Anglian Water, Balfour Beatty, Barhale, Binnies, MMB, MWH Treatment, Skanska, and SWECO – along with our extended supply chain. Together, we deliver over half of Anglian Water’s capital investment programme.
As we prepare for AMP8 – our most ambitious and innovative asset management period yet – we’re growing our team to meet the challenge. With a focus on sustainability, digital transformation, and engineering excellence, there’s never been a more exciting time to get involved.
Your role
We’re seeking a knowledgeable and driven Senior Mechanical Engineer to lead the design and technical delivery of mechanical systems across water and water recycling (non-infrastructure) projects. In this senior role, you’ll be responsible for ensuring that engineering solutions are technically sound, efficient, sustainable, and aligned with project goals.
What you’ll be doing:

• Leading mechanical design activities across a portfolio of projects, from initial feasibility through to detailed design and delivery support.
• Producing and reviewing technical specifications, ensuring compliance with relevant legislation and industry standards.
• Coordinating closely with project managers, multidisciplinary teams, suppliers, and contractors to achieve integrated project outcomes.
• Supporting hazard studies, design reviews, and safety assessments such as HAZOP and HAZCON.
• Driving innovation by adopting digital design tools, promoting offsite construction, and contributing to decarbonisation efforts.
• Providing support during construction and commissioning phases, resolving technical queries and ensuring buildability.
• Offering technical leadership to junior engineers, reviewing their work, and helping them develop their skills.
• Feeding into continuous improvement and technical governance processes, sharing lessons learned and best practice.

What we’re looking for:

• A degree in Mechanical Engineering (or a related discipline); Chartered or Incorporated Engineer status is desirable, or working towards it.
• Strong experience delivering mechanical design within the water, utilities, or infrastructure sectors.
• In-depth knowledge of mechanical systems, UK design codes, CDM regulations, and health and safety requirements.
• Competence in using CAD and other design tools (e.g. Autodesk Plant 3D, or similar).
• A collaborative mindset, with experience working in multidisciplinary environments.
• Strong written and verbal communication skills, with the ability to explain technical detail clearly and confidently.
• A problem-solving approach with a drive to innovate, improve efficiency, and embed sustainable thinking.

Why join us?
At the @one Alliance, you’ll be part of a genuinely collaborative environment where your voice is heard, your ideas are encouraged, and your growth is supported. Working on projects that directly impact communities, you’ll help to build a resilient and sustainable water network for the future.
We offer flexible working, clear development pathways, and the chance to work with experts from across eight leading organisations. It’s not just a job – it’s a place to grow, lead, and make a meaningful difference.
Our commitment to diversity and inclusion
We’re passionate about creating an inclusive and respectful workplace where everyone can thrive. We welcome applicants from all backgrounds and actively encourage individuals from underrepresented groups to apply. If you need any adjustments during the application or interview process, just let us know – we’re here to support you.
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