Senior MLOps and Machine Learning Engineer in London

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.

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.

In AECOM's AI Engineering team your code will directly shape the physical world around us. We build AI-driven technology that revolutionises how infrastructure and buildings are designed and engineered; reducing waste, cutting CO2, and making the built environment more efficient and sustainable. This is where software has measurable, real-world impact. Our AI Engineering team combines the speed, ownership, and technical ambition of a startup with the scale, resources, and domain expertise of one of the world's leading engineering firms.

You'll work on challenging applied machine learning problems spanning optimization, simulation, and real-world engineering systems, building models that move beyond experimentation and into products used to solve tangible infrastructure challenges. Lead the design and development of advanced machine learning models that deliver measurable impact across engineering and infrastructure applications.

• Own the end-to-end modelling lifecycle—from problem formulation and feature strategy through experimentation, validation, deployment, and iteration.
• Tackle complex, ambiguous problems and translate them into scalable ML solutions.
• Design robust experimentation frameworks and evaluation methodologies that measure real-world model performance.
• Diagnose model failure modes, evaluate performance trade-offs, and continuously improve models after deployment.
• Collaborate closely with MLOps and software engineering teams to productionize models while maintaining a strong focus on modelling quality and performance.
• Partner with product managers, engineers, and domain experts to embed AI capabilities into our SaaS platform.
• Provide technical leadership across ML initiatives, mentoring other engineers and helping shape modelling approaches, experimentation standards, and technical direction.

Must-Have Qualifications

• Proven experience developing and deploying ML models in production settings.
• Master's or PhD in Engineering, Computer Science, Applied Mathematics, Data Science, Operations Research, or a related field.
• Strong expertise in Python and modern ML frameworks (e.g., PyTorch, TensorFlow, scikit-learn).
• Demonstrated depth in model design, optimization, and evaluation beyond standard off-the-shelf approaches.
• Strong intuition for model failure modes, generalization, and real-world performance trade-offs.
• Experience owning machine learning initiatives end-to-end, from problem definition through deployment and iteration.
• Proven ability to independently scope, execute, and deliver high-impact ML initiatives.
• Clear communicator who can explain complex modelling decisions and trade-offs to diverse stakeholders.

Preferred Skills

• Experience applying machine learning to engineering-heavy or physical-world domains such as mechanical engineering, construction, transportation, HVAC, energy systems, or robotics.
• Background in optimisation, simulation, scientific machine learning, physics-informed learning, or digital twins.
• Experience with time-series forecasting, computer vision, sensor data, or other complex engineering datasets.
• Track record of mentoring or technically leading ML initiatives.
• Work on real-world problems where AI creates measurable impact.

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.

Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan.

As a trusted professional services firm powered by deep technical abilities, we solve our clients' complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle — from advisory, planning, design and engineering to program and construction management.

Work on groundbreaking projects—both in your local community and on a global scale—that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you'll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you've always envisioned.

Here, you'll find a welcoming workplace built on respect, collaboration and community—where you have the freedom to grow in a world of opportunity. 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.