Actemium UK helps customers reduce engineering risk by bringing together specialist design, substantiation, digital engineering, and delivery-focused project management for complex, safety-critical and highly regulated industries.
Our teams develop practical engineering solutions around your technical, operational, and commercial requirements, with manufacture, installation, operation, maintenance and recovery considered from the outset.
With decades of experience supporting complex nuclear, manufacturing, and industrial programmes, we bring together mechanical, process, piping, CE&I, automation, and specialist engineering expertise to reduce interfaces, manage risk, and provide greater continuity throughout your project.
Key customer benefits
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Greater project certainty
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Reduced engineering & delivery risk
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Better coordinated engineering
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Practical, deliverable solutions
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Confidence in design integrity
Our mechanical & process engineering expertise
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Engineering Consultancy & Design
Make informed engineering decisions with expert support from feasibility and optioneering through FEED, detailed design and delivery.
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MoreMechanical Design Engineering
Develop practical mechanical solutions for plant, equipment, handling systems and bespoke machinery, designed around performance, safety and deliverability.
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Process Engineering
Develop safe, efficient and reliable processes, from process definition and Basis of Design through to detailed engineering and implementation.
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Plant Equipment, Piping & Vessel Design
Design integrated plant, piping and vessel solutions around safety, performance, accessibility, installation and long-term maintainability.
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Engineering Assurance & Substantiation
Provide the engineering evidence needed to demonstrate that safety-critical structures, systems and components are safe, compliant and fit for purpose.
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Stress Analysis & FEA
Verify structural and mechanical integrity through specialist stress, finite element, seismic, dynamic and pipe stress analysis.
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Digital Design & Engineering
Improve design accuracy, collaboration and right-first-time delivery using laser scanning, 3D modelling, virtual reality and rapid prototyping.
Engineering support throughout the project lifecycle

Whether you need a specialist engineer to solve a specific technical challenge or a multidisciplinary team to support a major programme, we can scale our expertise around your objectives.
Our teams can support requirements capture, site surveys, feasibility and optioneering, concept and detailed design, engineering analysis and substantiation, specifications, testing, and commissioning documentation.
This gives you the flexibility to engage Actemium for a specific stage or bring our expertise together across multiple stages of your project.
Why customers work with Actemium UK
Customers engage Actemium UK when they need practical engineering design support that combines technical depth with delivery discipline. Our teams understand the realities of working in complex operational environments, where design decisions need to account for safety, compliance, access, maintainability, constructability, and long-term operation.
By combining specialist design capability with project management, assurance, and wider Actemium UK delivery expertise, we help customers move from early definition to practical, supportable engineering solutions with fewer interfaces to manage.
Engineering expertise you can rely on
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Complex and regulated environments
Experienced in safety-critical projects with demanding technical, operational and compliance requirements.
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Trusted technical expertise
Multidisciplinary engineering capability, including SQEP and security-cleared personnel where required for sensitive or regulated programmes.
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Proven delivery
Engineering delivered around defined scope, programme, cost, quality and technical requirements.
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One engineering partner
Integrated expertise across disciplines, reducing interfaces and simplifying delivery.
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Scalable lifecycle support
From individual specialists to multidisciplinary teams, with the complete asset lifecycle considered.
Proven on complex engineering programmes
Our teams have supported some of the UK’s most complex and strategically important engineering programmes, particularly across nuclear decommissioning and nuclear fuel.