Senior Systems Architect

Start here. Grow here.

“Are you ready to join a team of talented engineers and shape the future of the Nuclear Industry?”

AECOM's Systems Engineering team in Warrington provides multi-disciplinary consultancy to the nuclear industry, Ministry of Defence (MoD) and other such security classified clients. We provide consultancy services to the nuclear new build, decommissioning sectors, MoD facilities, ITER and the DIO.

Our Warrington office supports and provides an array of consultancy services to various diverse clients including:

• Defence sector providing multi-disciplinary new build support to various clients.
• MoD supporting the Nuclear CASD providing new facilities around the UK
• Defence Infrastructure Organisation
• Nuclear new build sector where we are providing engineering support to the developers of the UK’s fleet of new nuclear power stations
• Decommissioning Sector, which requires considerable new build to enable decommissioning, where AECOM provides support to the entire Nuclear Estate.
• Joint ventures overseas, providing engineering expertise from cradle to grave.

Here’s what you’ll do:

• Identification of all Systems, Sub-systems and Components (SSCs) and definition of interfaces and relationships between them.
• Facilitate optimisation of System performance through Requirements analysis and design.
• Identification and mitigation of risk through modelling System behaviour.
• Interface with client technical and non-technical teams, remotely and directly on-site.
• Authoring and reviewing technical documentation and processes.
• Apply Systems Engineering best practices and approaches to grow the Systems Engineering capability within the engineering team.

You are expected to be able to work on your own and as part of a team liaising with engineers of different disciplines, to ensure a complete and unified design.

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:

• Experience in Model Based systems Engineering (MBSE) and SysML.
• Experience and a full understanding of Systems Engineering, the V-model and associated processes/lifecycles.
• Degree qualified in STEM or a similar subject, or demonstratable engineering experience supported by appropriate qualifications.
• Chartered Engineer, or on the path to Chartered status with an appropriate institute.
• Currently SC cleared or able to meet SC requirements.
• Experience in highly regulated industries such as Defence, Oil & Gas, Pharmaceutical, Nuclear.
• Experience in writing and formally reviewing high quality technical documentation.
• Knowledge of Systems Engineering practices, methodologies, processes, techniques, and technology trends e.g. SEBoK, INCOSE practices, NASA System Engineering, DOORS.

Preferred Additional Qualifications / Skills

• Team management and Leadership.
• Project management skills.
• Criticality awareness.
• Radiation awareness.
• HAZOP knowledge.
• Nuclear site operations.
• Nuclear decommissioning.
• Nuclear new build.
• Nuclear safety cases.

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.

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: Candidate Brochure

#LI-RP1 #AECOMUKNUCLEAR #AECOMUKEC&INUCLEAR

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.