What REACT Engineering does

REACT Engineering Ltd is a UK-based, privately held engineering consultancy and project delivery firm specialising in nuclear decommissioning. Founded in 1994 and headquartered in Cleator Moor, Cumbria, with a satellite office in Warrington, the company operates two integrated service lines: React Consultancy, which provides strategic, engineering and project management advisory across the full decommissioning lifecycle (front-end project definition, programme strategy, engineering studies, technology selection, decommissioning methodology development, and bespoke modelling tools including strategic portfolio/programme/project modelling, 3D radiation dose mapping, and project scheduling/risk modelling), and React Projects, established in 2022, which leads, integrates and delivers decommissioning and waste management projects end-to-end in complex and hazardous environments.

The firm's technology stack combines proprietary modelling software, specialist engineering expertise, and emerging teleremote and robotic capabilities. Notable deployments include Boston Dynamics Spot quadruped robots equipped with Createc N-Visage radiological sensors and LiDAR for first-of-its-kind surveys of high-active evaporator cells at Dounreay, and bespoke polyurethane/intumescent spray coating solutions at Sellafield. React operates within multi-party procurement vehicles including the Cumbria Nuclear Solutions Limited (CNSL) consortium, the Nuclear Decommissioning Ltd (NDL) consortium at Dounreay, and the Resolve Engineered Solutions joint venture with Forth, PAR Systems and COMS.

The business model is professional services delivered through direct enterprise sales to government clients within the UK Nuclear Decommissioning Authority (NDA) estate — principally Sellafield Ltd, Nuclear Restoration Services and Nuclear Waste Services — via long-term contracts and framework agreements, with adjacent international work (e.g., Fukushima, Japan) and a small defence nuclear practice. Approximately 60 staff are supported by a structured React Futures talent development programme. Phil Redfern, who joined as a gap-year student in 2002 and became Managing Director in 2016, completed a management buy-out in 2019 and is the majority shareholder; no institutional investors or parent entities are evidenced.

Name

REACT Engineering

Legal name

React Engineering Ltd

Website

https://react-engineering.co.uk

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

11–50 employees

Short description

REACT Engineering is a privately held UK consultancy (founded 1994, ~60 staff) that provides engineering, project management and decommissioning delivery services to the UK Nuclear Decommissioning Authority estate, principally Sellafield Ltd, Nuclear Restoration Services and Nuclear Waste Services.

Ownership category

akta.pro rank

Product category

Nuclear Decommissioning Engineering Services

NAICS

Engineering Services (54133), Hazardous Waste Treatment and Disposal (562211), Management Consulting Services (54161), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711), Services-Management Consulting Services (8742), Hazardous Waste Management (4955)

akta.pro primary industry

Decommissioning Program Management, Engineering & Regulatory Closure (EUAKAFAA)

akta.pro secondary industries

Nuclear Plant Decommissioning & Site Restoration (EUACADAJ), Repository operations & waste emplacement (handling systems, emplacement, ventilation) (EUAKAGAI), Performance assessment, safety case & long-term monitoring (modeling, PA/SR, instrumentation) (EUAKAGAJ), Instrumentation & Control (I&C) Integration & Commissioning Support (EUAKAAAH)

Keywords

• Nuclear decommissioning services
• Engineering consultancy
• Project management services
• Radiological characterization
• Nuclear waste management

Headquarters

HQ city

Cleator Moor

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Engineering and Technical Consultancy: Strategic, engineering and project management consultancy services including front-end project definition, requirements management, strategic decision making, engineering studies, technology selection, project engineering on regulated sites, and decommissioning methodology development
2. Project Management and Delivery Services: End-to-end programme and project management services in high-hazard decommissioning environments, including commercial management, technical integration, project controls, risk management, and project engineering support
3. Projects Division: Leads, integrates and delivers decommissioning and waste management projects in complex and hazardous environments, established in 2022

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

REACT Engineering provides specialist nuclear decommissioning engineering consultancy and project management services through two integrated divisions. React Consultancy delivers strategic, engineering and project management consultancy including front-end project definition, programme strategy, engineering studies, technology selection, and decommissioning methodology development. React Projects delivers end-to-end programme and project management for high hazard decommissioning and waste management projects in complex and hazardous environments.

Product overview

REACT Engineering is a specialist nuclear decommissioning engineering and project management consultancy offering two integrated service lines: React Consultancy (strategic, engineering and project management consultancy services) and React Projects (end-to-end programme and project delivery for high hazard decommissioning). The company also operates the React Futures Programme for talent development. Within consultancy, they provide bespoke modelling solutions including strategic portfolio modelling, 3D radiation dose mapping and activity modelling, and project scheduling and risk modelling. The company was founded in 1994 and employs approximately 60 staff.

Differentiator

Problem solved

Functional benefit

Products and services

• React Consultancy Provides strategic, engineering and project management consultancy services for nuclear decommissioning and waste management projects. Includes front-end project definition, programme strategy development, engineering studies, technology selection, project engineering on regulated sites, and decommissioning methodology development with design for decommissioning expertise. For government-owned nuclear site operators and decommissioning contractors within the UK NDA estate.
• React Projects End-to-end programme and project management services for high hazard decommissioning, including commercial management, technical and engineering integration, project controls, risk and stakeholder management, and project engineering support. For clients requiring delivery of decommissioning and waste management projects in complex and hazardous environments.
• React Futures Programme Career development programme providing financial and professional support for young people to pursue STEM education while gaining industry experience. Includes school leaver pathways, university placements, graduate positions, and apprenticeships, with annual salary support during studies (approximately £14k for school leavers during university and over £20k for year-in-industry placements). For young people pursuing STEM careers and university students.

Quantifiable outcome

• £5M cost savings through innovative ejector unblocking solution at Sellafield MASE
• +3 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

17 partnerships are on record, tiered core and minor.

• Cumbria Nuclear Solutions Limited (CNSL)coreStrategic or Co-development PartnerReact works as part of the CNSL partnership consortium to provide integrated multi-disciplinary teams for Sellafield decommissioning projects. CNSL brings together engineering, construction and subject matter experts to deliver complex nuclear decommissioning solutions.
• CreateccoreTechnology or IntegrationTechnology partner providing N-Visage Explore radiological survey equipment and LiDAR scanning technology mounted on Boston Dynamics Spot robots for nuclear facility characterisation and decommissioning planning.
• Boston DynamicscoreTechnology or IntegrationTechnology provider of Spot robot platforms deployed for the first time in UK nuclear for high-active cell survey at Dounreay, enabling remote characterisation of radioactive environments.
• Nuclear Decommissioning Ltd ConsortiumcoreChannel Partner/ Reseller/ DistributorReact operates as part of the NDL consortium to deliver decommissioning projects at Dounreay site, providing technical leadership and project management capabilities.
• Resolve Engineered SolutionscoreStrategic or Co-development PartnerJoint venture bringing together React Engineering (strategic project planning), Forth (innovative engineering), PAR Systems (mechanical handling), and COMS (pre-operations, commissioning, and integration) to deliver end-to-end engineering services. Won BECBC Collaboration Award 2024.
• Shepley's EngineersminorImplementation/ SI/ Consulting PartnerEngineering partner on Sellafield demolition project providing construction and demolition expertise as part of multi-disciplinary team.
• Tetra TecminorImplementation/ SI/ Consulting PartnerPartner on Sellafield demolition project providing specialist engineering and technical services.
• JBV DemolitionminorImplementation/ SI/ Consulting PartnerDemolition contractor partner on Sellafield project for physical decommissioning works.
• ForthcoreStrategic or Co-development PartnerCumbrian SME partner in Resolve Engineered Solutions joint venture, providing innovative engineering capabilities. Also constructed full-scale test rig at Flimby facility for coating trials.
• PAR SystemscoreStrategic or Co-development PartnerCumbrian SME partner in Resolve Engineered Solutions joint venture, bringing mechanical handling expertise with global reputation.
• COMS (Cumbria Operations and Maintenance Service Ltd)coreStrategic or Co-development PartnerCumbrian SME partner in Resolve Engineered Solutions joint venture, providing pre-operations, commissioning, and integration specialist capabilities.
• Genr8 NorthminorOthersCumbrian property developer who has undertaken 18-month restoration of historic Flax Works building for React's new headquarters. Privately funded development includes 100KW solar array.
• React FoundationcoreOthersCharity established in 2004 celebrating 20th anniversary, dedicated to inspiring and supporting new generations of engineers in STEM careers. React staff contribute over 1000 hours of volunteering annually.
• Nuclear Decommissioning Authority (NDA)coreOthersGovernment body responsible for decommissioning UK's first generation nuclear and research plants. React works across the NDA estate including Sellafield, Dounreay, Winfrith, and Low Level Waste Repository.
• Nuclear Restoration ServicescoreOthersPart of NDA Group responsible for decommissioning UK's first generation nuclear and research plants. React provides services at Dounreay site through NDL consortium.
• Nuclear Waste ServicescoreOthersPart of NDA Group. React supported Treated Radwaste Store drums project at Low Level Waste Repository enabling early disposal of waste.
• Sellafield LtdcoreOthersPrimary client organisation at Sellafield site. Long-term valued relationship. React provides strategic, engineering and project management consultancy across full decommissioning lifecycle.

Scale indicators8 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• Cavendish Nuclear (Babcock International): UK-based nuclear services division of Babcock International providing decommissioning, waste management and project services across the NDA estate. Directly comparable to React as a UK nuclear decommissioning delivery partner, but operating at significantly larger scale as part of a Tier-1 prime.
• Nuvia: Specialist nuclear engineering, decommissioning and waste management services provider operating across the UK and internationally. Direct peer to React in nuclear decommissioning consultancy and project delivery, with overlapping client base in the NDA Group and complementary radiation/risk capabilities.
• Forth Engineering: Cumbrian engineering firm specialising in nuclear and high-hazard environments, and React's joint venture partner in Resolve Engineered Solutions. Highly comparable in scale, sector focus and West Cumbrian roots, making it the closest operational and geographic peer.
• SLR Consulting: Environmental and engineering consultancy with a UK nuclear decommissioning practice serving Sellafield, NDA and waste management clients. Similar mid-tier consulting profile to React with overlapping environmental, characterisation and regulatory support work.
• Frazer-Nash Consultancy: UK engineering and technology consultancy with a strong nuclear and high-hazard safety practice supporting defence and civil nuclear clients. Comparable to React as a specialist consultancy with deep technical modelling and safety case expertise serving regulated nuclear customers.
• RPS Group: Consultancy providing environmental, programme management and decommissioning services to the UK nuclear sector. Comparable mid-tier consulting peer to React, with overlapping environmental, characterisation and project management offerings for NDA estate clients.

Broad incumbents

• Jacobs: Global professional services firm with a large nuclear decommissioning practice across the UK NDA estate, including framework roles at Sellafield and Dounreay. Broad incumbent that competes with React on consulting slots while also anchoring consortium bids.
• AtkinsRéalis (Nuclear): Global engineering services firm with a significant nuclear decommissioning and new-build practice in the UK, supporting Sellafield, Magnox and NDA programmes. Competes for higher-value programme management and engineering scopes that overlap with React's React Consultancy and React Projects offerings.
• WSP: Global engineering consultancy with established nuclear decommissioning and environmental remediation capabilities in the UK. Comparable as a multi-disciplinary engineering services peer competing for technical studies and programme support across the NDA estate.

Emerging players

• Createc: Cumbrian technology firm whose N-Visage radiological survey equipment React integrates onto Boston Dynamics Spot platforms. A technology partner and emerging peer in the niche of radiation characterisation and remote sensing for nuclear decommissioning, with overlapping end customers and use cases.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/react-engineering
• Xx.com/REACTEng

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about REACT Engineering