Senior Mechanical Engineer - Water

At AECOM, we’re delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world’s trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and join a global team of over 50,000 professionals delivering projects that create a positive and tangible impact around the world.

Start here. Grow here. Are you ready to shape the future of water infrastructure? We’re looking for a Senior Mechanical Engineer to join our growing South East / London Water Solutions team, with flexibility to be based out of one of our South East/London offices (Basingstoke, Croydon, London & St Albans). In this role, you’ll play a key part in delivering multi‑billion‑pound capital programmes across the UK water sector, contributing to projects ranging from small rural sites to complex, multi‑million‑pound infrastructure and non‑infrastructure schemes in both water and wastewater. These long‑term frameworks extend through AMP8 and AMP9, offering security, variety, and the opportunity to make a real impact in shaping sustainable water solutions.

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• Southern Water – £3.7 billion Capital Delivery Programme
  
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  • Strategic Delivery Partner (SDP) Frameworks: Supporting Tier 1 Contractors on
    
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    • Lot 1: Non‑infrastructure water projects
      
    • Lot 2: Non‑infrastructure wastewater projects
      
    • Low Complexity Delivery Route & SDP Lot 3 Infrastructure Frameworks: Partnering exclusively with Tier 1 Contractors to deliver high‑quality wastewater infrastructure projects.
      
    
    
    
  
  
  
• South West Water – Engineering Consultancy Services Framework
  
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  • Lot 3 – Multi‑Discipline Engineering Design
    
  
  
  
• Wessex Water – Capital Delivery Partner Framework
  
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  • Lot 2 – Design Consultants
    
  
  
  

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• Produce feasibility studies, outline design, detailed design and construction support.
  
• Produce design drawings, mechanical plant selection and specification.
  
• Liaise and collaborate with our water and other discipline teams including civil, electrical, process and mechanical engineers nationwide.
  
• Deliver a high calibre of technical quality, contribute to bids, interface with clients and collaborators in design and planning.
  
• Deliver to agreed budget, programme and quality while supporting the preparation of project budget & programme.
  
• Design mechanical installations typically including municipal water and wastewater pumping stations, screens, grit removal plant, penstocks, valves, odour control systems, pipework etc.
  
• Conduct site visits to carry out surveys and liaise with clients, contractors & suppliers.
  
• Produce plant layouts, technical specifications, Wimes datasheets, valve schedules, equipment schedules, lifting strategies and P&IDs.
  
• Design pumping stations, perform headloss calculations and pumping system analysis / pump selection.
  

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• A degree (or equivalent) in Mechanical Engineering.
  
• Progress towards Chartered Engineer status with a relevant institution, such as IMechE.
  
• Proven ability to deliver engineering designs, reports, drawings, technical specifications and calculations with confidence and precision.
  
• Hands‑on experience in delivering innovative solutions for water and/or wastewater engineering projects.
  

Interested in the role or curious about life at AECOM? Follow us on LinkedIn, Facebook, Instagram, and YouTube to explore our voices, employee stories, latest projects, and much more! For further information about the role, reach out to the recruiter on LinkedIn: Anne Marie Flynn.

We celebrate diversity, including neurodiversity, and believe it enriches our team. We welcome applications from all backgrounds and abilities. If you are an applicant with a disability that requires reasonable accommodation to complete the application process, please contact us at . At AECOM, we value everyone’s unique contributions and perspectives. If you meet some of the requirements above or have transferable skills you believe would benefit us, we would be delighted to hear from you.

All your information will be kept confidential according to EEO guidelines. We are a Disability Confident Employer and will offer an interview to applicants who have a disability or long‑term condition, who meet the minimum/essential criteria for the role. Please let us know using this email address if you would like to apply through the Disability Confident Interview Scheme.