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Senior Mechanical Engineer - Water

Job in London, Greater London, W1B, England, UK
Listing for: COWI
Full Time position
Listed on 2026-08-12
Job specializations:
  • Engineering
    Mechanical Engineer, Environmental Engineer
Job Description & How to Apply Below
Senior Mechanical Engineer (Water Utilities) London / Derby / Glasgow Permanent Office/Home Hybrid Working Do you want to be a part of a growing M&E team? Can you collaborate with colleagues across UK and International projects? Are you experienced in Mechanical Infrastructure Design? Then, this could be the next adventure in your career. Create Solutions that will enable a better tomorrow To further our mechanical capability on Infrastructure projects, we are looking for a Senior Mechanical Engineer with a Water Utilities background to join us.

Your primary task will be to deliver engineering work related to the design of elements including water supply and wastewater infrastructure and non-infrastructure equipment. This includes pressurised mains, pumping stations, treatment works apparatus and other relevant equipment.

Your role will be focused on the design environment, which, while based in the UK, will involve interacting day-to-day with colleagues across our global hubs. There may also be opportunities to broaden your contribution to other areas within the MEP discipline as well as client-side or site-based roles in a variety of major infrastructure settings.

Your key responsibilities will be:
Contributing towards the design of projects for a wide range of clients

Planning design work and deliverables together with wider MEP team Development and technical assurance of design including use of relevant software

Ensuring compliance with both local and international standards

Coordination of multi-disciplinary aspects of projects

Mentoring junior team members in design

Contributing to the building of relationships with clients and other stakeholders

Your skills. Our team. Together we design the future. The first step to success in this role is that you are eager to collaborate with the people around you, whether they are colleagues, partners, or customers. Developing ties with others is something you do by acting respectfully and delivering on your promises. And you never get set in your ways but keep exploring new insights and ways to improve.

On top of that, you’ll have: A degree in mechanical engineering or similar

Achieved Chartered Engineer status (or equivalent)
Relevant experience within mechanical systems design

The ability to provide technically sound solutions alone and where required, acting as a discipline leadA solid mechanical understanding of water-based systems such as pressurised water supply mains, pumping stations and treatment works apparatus

Experience with hydraulic modelling of pipe networks, steady state and transient analysis calculations

Knowledge on pipe support and stress calculations

Exposure to other mechanical equipment such as lifting equipment, actuated hydraulic gates and building services would be an advantage

Experience with 3D and BIM design

Knowledge of relevant UK Water Industry Specifications (WIMES)

Experience of applying CDM
2015 regulations to design tasks

Experience of design and build projects would be beneficial which may include designer's representation on siteA place to work and so much more

At COWI, we work together with our customers to shape a sustainable and liveable world. We do it by applying our knowledge and curiosity – and sometimes even our courage – to create the solutions the world needs today to enable a better tomorrow. We support our customers’ transition towards increased sustainability. We strive to lead by example by embedding environmental management, social responsibility and good governance into our business practices and the options we provide to our customers.  

We value differences and development and cultivate an environment of belonging and having fun. Because that is what brings out the best in you, at work and h offices primarily located in the Nordic region, the UK, North America and India, we are currently more than 7,500 people who bring their expertise in engineering, architecture, energy and environment into play.  

What we also offer:
To us, a fair reward is more than a competitive salary. We want to take care of our people professionally and personally as well. Some of our benefits include: 28 days' holiday plus all UK bank…
Position Requirements
10+ Years work experience
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