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AECOM is an American infrastructure consulting firm that became independent in 1990 through a management buyout from the energy group Ashland, and is now one of the largest design and engineering organisations in the world. It plans, designs and manages delivery of transport systems, water and wastewater infrastructure, buildings, environmental remediation and energy projects for public agencies and private developers across roughly one hundred and fifty countries. Headquartered in Dallas after relocating from Los Angeles, the company sold its self-perform construction and government services arms to concentrate on higher-margin professional services rather than carrying construction risk.

"Empowering Innovation in Nuclear Energy: Join AECOM’s Vision for a Sustainable Future!"

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 join a team of talented engineers and shape the future of the Nuclear Industry?”

Due to the continued growth and expansion of our Nuclear Team, we are looking enhance our technical capabilities and are seeking to recruit a Principal Mechanical Engineer.

We are looking for individuals who can apply their skills independently and as part of a team to deliver projects to the benefit of our Clients. Inherently the projects are multi-disciplinary and may be at any stage in the project life cycle. Our projects range from client consultancy support to complete turn-key solutions.

In addition to Mechanical Engineering duties, you will be required to both manage junior level team members and project report on their packages of work.

Additional responsibilities may include the client interface, assistance in the preparation of bids and proposals and then managing the delivery of projects in accordance with AECOM’s quality, safety and environmental procedures.

This is an exciting time for the Nuclear Team with an interesting and expanding pipeline of both international and UK based projects.

Here’s what you’ll do:

  • Presently involved in a position with a substantial emphasis on design activities.
  • Provide technical leadership and guidance on mechanical engineering projects, ensuring high-quality, innovative, and compliant solutions.
  • Lead and mentor a team of engineers and technicians, fostering a collaborative and high-performance work environment.
  • Successfully deliver projects and support other professional engineers in defining, executing, and completing engineering work packages.

Come grow with us.

Become part of our dynamic nuclear team, which boasts a team of leading and innovating industry experts. 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. At AECOM, you’ll thrive in an inclusive and forward-thinking environment where your contributions are valued.

And let's not forget about 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.

Why Join Us:

  • Be part of a dynamic team that tackles challenging and impactful nuclear projects.
  • Work alongside industry-leading professionals and thought leaders.
  • Engage in a collaborative and inclusive work environment.
  • Access to continuous learning and development opportunities.
  • Competitive salary and comprehensive benefits package.
  • Enjoy the flexibility to work in a way that fits your lifestyle while supporting a healthy work-life balance.

Ready to push the limits of what’s possible?

Here’s what we’re looking for:

The successful Principal Mechanical Engineer will have/be:

  • Hold a qualification in Mechanical Engineering, preferably to Degree level with Chartered Engineer (CEng) with IMechE or equivalent institute.
  • Demonstrable expertise with a track record of successful application of specialist knowledge or skills.
  • Current experience working in a post where design was a major part of the role.
  • Extensive post Chartership experience working in roles where your engineering knowledge of relevant practices, techniques and procedures is a key attribute.
  • Able to demonstrate Management of a team or function and in particular within complex or novel assignments.
  • Demonstrable record of successful delivery.
  • Able to demonstrate a working knowledge of:
    • Handling and manipulation of fissile materials in complex equipment and process systems
    • 3D CAD systems and associated data management systems
  • Able to establish new/or enhance existing processes/procedures.
  • Able to prepare and deliver technical presentations.
  • Understanding of design principles and ability to apply them.
  • Have a working knowledge of appropriate nuclear standards and specifications as well as general engineering standards.
  • Able to demonstrate good knowledge and experience in producing and having input to; Mechanical hand sketches; 3D scheme models; Functional calculations; Design risk assessments; Directive compliance assessments; Commissioning activities; Post project review meetings.
  • Able to underpin and agree remaining project work durations with Project Managers.
  • Highlight (at the earliest opportunity) when a task will not be completed to a previously agreed timescale.
  • Identify and report change.
  • Ensure that HSE legislation is applied at a project level
  • Provide input to QA audits as appropriate.
  • Report non-conformities, incidents and observations through the appropriate systems.
  • Excellent written and verbal communication skills.

You will also be self-motivated with an ability to work both autonomously where required, with a strong sense of commitment, a willingness to learn and a desire to work in a dynamic deadline driven team environment.

At AECOM, we believe in creating a better world through innovative and sustainable solutions. If you share our vision and are ready to make a difference in the nuclear industry, we want to hear from you.

Security Clearance

Please note that our offer of employment is conditional upon your ability to meet UK security clearance requirements. This is necessary for you to work on the full range of projects requiring security clearance at AECOM Infrastructure and Environment UK Limited.

Application Support

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

“Want to find out more about the role or what working at AECOM is like?”

You can learn more about us here: Energy Brochure

Or why not connect directly with our recruiter on LinkedIn to unlock insights and take the next step towards your dream career!

Click here to connect with the Recruiter via LinkedIn

Alternatively you can email the recruiter at [email protected] or register your interest here and we’ll keep you updated on our latest opportunities.

#LI-RP1 #AECOMUKNUCLEAR #AECOMUKNUCLEARMECHANICAL

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM

AECOM is the world’s trusted infrastructure consulting firm, delivering professional services throughout the project lifecycle - from advisory, planning, design and engineering to program and construction management. On projects spanning transportation, buildings, water, new energy and the environment, our public- and private-sector clients trust us to solve their most complex challenges. Our teams are driven by a common purpose to deliver a better world through our unrivaled technical and digital expertise, a culture of equity, diversity and inclusion, and a commitment to environmental, social and governance priorities. AECOM is a Fortune 500 firm and its Professional Services business had revenue of $16.1 billion in fiscal year 2025. See how we are delivering sustainable legacies for generations to come at aecom.com and @AECOM.

Freedom to Grow in a World of Opportunity

You will have the flexibility you need to do your best work with hybrid work options. Whether you’re working from an AECOM office, remote location or at a client site, you will be working in a dynamic environment where your integrity, entrepreneurial spirit and pioneering mindset are championed.

You will help us foster a safe and respectful workplace, where we invite everyone to bring their whole selves to work using their unique talents, backgrounds and expertise to create transformational outcomes for our clients.

AECOM provides a wide array of compensation, benefits and well-being programs to meet the diverse needs of our employees and their families. We’re the world’s trusted global infrastructure firm, and we’re in this together - your growth and success are ours too.

Join us, and you’ll get all the benefits of being a part of a global, publicly traded firm - access to industry-leading technology and thinking and transformational work with big impact and work flexibility. As an Equal Opportunity Employer, we believe in each person’s potential, and we’ll help you reach yours.

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 [email protected] if you would like to apply through the Disability Confident Interview Scheme.

All your information will be kept confidential according to EEO guidelines.

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