Principal Mechanical Engineer - Water Industry

 Work with Us. Change the World. 
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 become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.We're one global team driven by our common purpose to deliver a better world. Join us. Start here. Grow here. 
 Are you ready to shape the future of water infrastructure 
We’re looking for a  Principal Mechanical Engineer  to join our growing  Water Solutions team , with opportunities to be based across our England & Wales offices.
In this role, you’ll play a key part in delivering major UK water utility investment programmes, supporting the design and delivery of projects that range from small rural sites to multi-million-pound infrastructure and non-infrastructure schemes. These frameworks are long-term and extend through  AMP8 and AMP9 , giving you the chance to contribute meaningfully to sustainable water solutions across multiple regions.
You will support the delivery of several high-value capital programmes, including:

 South West Water  – Framework for Engineering Consultancy Services:
Lot 3 - Multi-Discipline Engineering Design

 Wessex Water  – Capital Delivery Partner Framework Agreement:
Lot 2 - Design Consultant

 Severn Trent Water  – Lot 1 Major Projects Framework:
Supporting AMP8 delivery plan valued at a TotEx of  £14.9 billion 

 Severn Trent D&B Projects  – Supporting Tier 1 contractors on major non-infrastructure wastewater schemes

 Southern Water Strategic Delivery Partner (SDP) Frameworks :

Lot 1Non-infrastructure water projects

Lot 2Non-infrastructure wastewater projects

 Southern Water Low Complexity and Infrastructure Frameworks :

Lot 2Wastewater Infrastructure

Lot 3Infrastructure Framework – Partnering exclusively with Tier 1 contractors to deliver efficient and sustainable water and wastewater solutions

Working flexibly, you’ll visit client sites and collaborate with teams across multi-year frameworks. As part of our thriving business, you’ll take on rewarding multi-disciplinary projects from inception to delivery, creating innovative solutions that enhance the environment and improve communities. Here's what you'll do:

Develop feasibility studies, outline and detailed designs, and provide construction support.

Create design drawings, select mechanical plant, and prepare technical specifications.

Collaborate with multidisciplinary teams, including civil, electrical, process, and mechanical engineers.

Ensure high technical quality, contribute to bids, and maintain client relationships.

Manage project budgets, schedules, and deliverables to meet agreed targets.

Design mechanical installations for water and wastewater systems, including pumps, screens, valves, and odour control.

Conduct site surveys and liaise with clients, contractors, and suppliers.

Produce layouts, technical specifications, datasheets, and P&IDs for system designs.

As well as providing innovative and industry leading MEICA solutions to Clients, the team also collaborates with a wide variety of disciplines from other offices in delivering projects, including a close working relationship with our Enterprise Capabilities centres in India, South Africa and Romania. Come grow with us. 
Become part of our dynamic Water business, which boasts around 700 experts across the UK & Ireland, including 170 specialists across our England & Wales Water Solutions team. Collaborate with top-tier civil, mechanical, electrical, and process engineers to deliver a variety of captivating projects, from small initiatives to large-scale ventures, all the way from concept to completion. Here, you’ll thrive in an inclusive and forward-thinking environment where your contributions are valued. Enjoy the Perks. 
At AECOM you'll enjoy a range of core and personalised benefits designed to support your future and well-being, customised to fit your lifestyle. Take advantage of career development opportunities, our flexible hybrid working model to ensure a work-life balance that suits your lifestyle, technical practice networks, AECOM University, and volunteering days. Qualifications 
 Ready to push the limits of what’s possible 
Here’s what we’re looking for:

A degree in Mechanical Engineering with Chartered Engineer status (or working towards it) through a recognised institution like IMechE.

Proven expertise in producing, reviewing, and approving engineering reports, designs, drawings, and specifications.

A problem-solver at heart—confident in taking ownership of challenging technical issues and seeing them through to resolution.

Strong coordination skills, ensuring the quality and consistency of deliverables produced by the wider team.

Leadership potential—able to manage direct reports, inspire technical excellence, and support the growth of fellow engineers.

Exceptional client and stakeholder engagement skills, with experience in team leadership, mentoring, and line management.

Experience in the water and/or wastewater industry.

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 [email protected]. 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! Additional Information 
Interested in the role or curious about life at AECOMFollow us on LinkedIn, Facebook, Instagram, and YouTube to explore our AECOM voices, employee stories, latest projects, and much more!For further information about the role, reach out to the recruiter on LinkedIn - Jay Hewitt.