What NSG Environmental does

NSG Environmental Ltd is a UK-based nuclear sector engineering, waste management and decommissioning services firm, founded in 1984 and headquartered in Chorley, Lancashire. The company operates as a wholly-owned subsidiary of NIS Holdings Ltd, a privately held diversified group (alongside NIS Ltd and Hold Engineering Ltd) employing over 250 staff with group turnover exceeding £36 million. NSG delivers integrated solutions across the full nuclear project lifecycle — problem definition and strategy development (including the Data Quality Objectives/DQO methodology), research and development, lifecycle engineering design and build, installation, commissioning and operations, decommissioning planning and characterisation, and integrated waste management — with particular specialisation in nuclear waste solidification and encapsulation, wet waste sampling/retrieval/processing, and waste characterisation for disposability assessments.

The company serves two primary customer segments: the UK civil nuclear sector (Sellafield Ltd, Nuclear Restoration Services, Nuclear Waste Services, NDA, Dounreay, Magnox) and the defence nuclear sector (AWE, MOD, HMNB Devonport, HMNB Clyde), plus research bodies such as STFC. Its revenue model is professional services delivered through multi-year framework agreements (e.g., the NWS ESAS Framework, NDA Research Portfolio Framework, Magnox DAR Framework, Dounreay Technical and Professional Support Services Framework) and direct project contracts won via competitive tendering. Technical delivery is underpinned by 4,800m² of purpose-built facilities including a High Bay with 20-tonne gantry crane, Low Bay testing facility, analytical laboratory, mechanical workshop, and underwater testing facility. The company maintains ISO 9001/14001/45001 certifications, Cyber Essentials Plus, 23 consecutive RoSPA Awards (including a 2025 Engineering Services Sector Award), and a safety record of over 5 million hours without a RIDDOR event.

Name

NSG Environmental

Legal name

NSG Environmental Ltd

Website

https://nsgltd.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

101–250 employees

Short description

NSG Environmental provides engineering, waste management, and decommissioning solutions to the UK civil nuclear and defence sectors (Sellafield, AWE, NWS, NDA, MOD), delivering integrated projects via long-term framework agreements from facilities in Chorley and four other UK sites.

Ownership category

akta.pro rank

Product category

Nuclear Decommissioning and Waste Management Services

NAICS

Environmental Consulting Services (541620), Waste Management and Remediation Services (562)

SIC

Hazardous Waste Management (4955), Services-Engineering, Accounting, Research, Management (8700), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Spent Fuel Management Engineering, Consulting & Digital Tools (Thermal/Shielding/Criticality, QA) (EUAKAHAL)

akta.pro secondary industries

Regulatory compliance, licensing & stakeholder engagement for disposal (permits, public consultation, communications) (EUAKAGAK), Defense Software, Mission Applications & Open Architecture (MOSA) Systems (IMABAOAM), IAEA Safeguards Implementation & Verification Support (inspections, declarations, reporting) (EUAKAJAE)

Keywords

• Nuclear decommissioning services
• Radioactive waste management
• Nuclear engineering solutions
• Waste characterisation
• Land remediation

Headquarters

HQ city

Chorley

HQ country

United Kingdom

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D

Revenue model

1. Engineering and Project Delivery Services: Full project lifecycle services including problem definition, strategy development, R&D, lifecycle engineering design and build, installation, commissioning, and operations. Revenue generated through direct project delivery contracts with nuclear sector clients.
2. Integrated Waste Management and Decommissioning: Hands-on waste management and decommissioning operations including size reduction, decontamination, waste packaging, and final disposal support. Delivered through integrated project teams.
3. Nuclear Consultancy: Technical consultancy services spanning civil and defence nuclear sectors, including waste management strategies, decommissioning planning, characterisation, and regulatory compliance support.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

NSG Environmental provides integrated engineering, waste management and decommissioning solutions to the UK civil nuclear and defence nuclear sectors. It delivers full project-lifecycle services spanning problem definition, R&D, engineering design and build, installation and commissioning, and hands-on waste characterisation, retrieval, processing and disposal.

Product overview

NSG Environmental is a nuclear industry services company offering an integrated portfolio of engineering, waste management, and decommissioning solutions. The company provides six core service offerings: Problem Definition and Strategy Development, Research and Development, Lifecycle Engineering Design and Build, Installation Commissioning and Operations, Decommissioning Planning and Characterisation, and Integrated Waste Management and Decommissioning. These services are delivered across three sector areas: Civil Nuclear, Defence, and Nuclear Consultancy. The company's integrated approach combines consultancy expertise with hands-on implementation and field-based teams. Technical capabilities are supported by 4,800m2 of purpose-built facilities including High Bay, Low Bay, Analytical Laboratory, Mechanical Workshop, Training Facility, Underwater Testing Facility, and fabrication/storage units. The company operates from multiple UK locations and serves major nuclear sites including Sellafield, Dounreay, and AWE.

Differentiator

Problem solved

Functional benefit

Products and services

• Problem Definition and Strategy Development Expert problem definition and strategy development services using qualitative and quantitative option assessment processes, including the Data Quality Objectives (DQO) process and behavioural change science to deliver robust and defensible solutions for nuclear clients.
• Research and Development R&D services for waste management solutions including desktop studies, technology investigations, proof of concept trials at laboratory and pilot scale, and technology readiness level validation, with expertise in wet waste sampling, retrieval and processing and nuclear waste solidification and encapsulation using cementitious and polymeric materials.
• Lifecycle Engineering Design and Build Full lifecycle engineering solutions from design and build through to testing, commissioning and ongoing asset management, covering all nuclear engineering disciplines.
• Installation, Commissioning and Operations Installation capability with specialist in-house site teams supported by engineering and health and safety professionals, delivering all phases of testing and commissioning including active commissioning, plus operational and maintenance support.
• Decommissioning Planning and Characterisation Decommissioning lifecycle expertise including pragmatic use of the Data Quality Objectives (DQO) process for waste characterisation, submissions for disposability assessments, and post-operational clean-out (POCO) services.
• Integrated Waste Management and Decommissioning Integrated waste-led decommissioning and disposability-led waste management services including size reduction, decontamination, specialist pressurised suit operations, health physics operations, and waste management from sampling to final disposal.
• Civil Nuclear Services Technical consultancy, R&D, plant design/integration/build, installation/testing/commissioning, waste management including characterisation/retrieval/processing/packaging, and decommissioning services for the civil nuclear sector.
• Defence Services Strategy development, technical expertise, rekit and refurbishment, infrastructure upgrades, obsolescence management, plant life extension, waste management, decommissioning, and land remediation services for defence organisations.
• Nuclear Consultancy Services Nuclear consultancy services including waste management and decommissioning strategy development, laboratory-scale trials, stakeholder engagement, characterisation support, and technical waste management support across civil and defence sectors.
• Remote Retrieval and Handling Facility (RRHF) Turnkey delivery of the Remote Retrieval and Handling Facility at Rutherford Appleton Laboratory to facilitate sustainable management of radioactive wastes, delivered from concept design through the whole project lifecycle to site acceptance testing and operator training using modular construction methods.

Quantifiable outcome

• 23 consecutive RoSPA Awards demonstrating sustained health and safety excellence
• +4 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

13 partnerships are on record, tiered core and minor.

• Nuclear Waste Services (NWS)coreStrategic or Co-development Partner · 1 January 2026Appointed to the Nuclear Waste Services Expert Support and Alternative Solutions (ESAS) Framework with an estimated value of £14.5 million. The framework provides specialist expertise and innovative waste management solutions supporting safe and effective management of current, future and legacy radioactive waste. NSG delivers hands-on waste characterisation and field services, technical advisory support, R&D, container and package quality assurance, and alternative waste management solutions.
• NDA (Nuclear Decommissioning Authority)coreStrategic or Co-development Partner · 1 May 2025NSG-led Unity+ team awarded the NDA Research Portfolio Framework Contract. This framework provides research capabilities to support NDA's decommissioning mission across UK nuclear sites.
• AXIOM and OneAIM Supplying PartnersminorStrategic or Co-development PartnerCollaboration through the OneAIM Framework on the Sellafield site. NSG participates in voluntary corporate sponsorship initiatives focused on delivering social value legacy for the Cumbria region.
• AtkinsRéalis, Nuvia, Orano, Cyclife UK, AmentumminorStrategic or Co-development PartnerFellow framework partners under the NWS ESAS Framework. NSG will work collaboratively with these partners to deliver practical, innovative and sustainable outcomes supporting safe decommissioning and effective radioactive waste management.
• STFC (Science and Technology Facilities Council)coreStrategic or Co-development PartnerNSG awarded contract to deliver the Remote Retrieval and Handling Facility (RRHF) at Rutherford Appleton Laboratory. NSG delivers complete turnkey facility from concept design through to site acceptance testing and operator training, working collaboratively with STFC.
• DounreaycoreStrategic or Co-development PartnerAwarded place on Dounreay Technical and Professional Support Services Framework, providing specialist technical and professional services to support Dounreay decommissioning programmes.
• MagnoxcoreStrategic or Co-development PartnerAwarded place on Magnox DAR (Decommissioning and Remediation) Framework for decommissioning and waste management projects. Currently delivering the MILWEP plant for Magnox.
• NIS Holdings LtdcoreStrategic or Co-development PartnerNIS Holdings Ltd is the parent company of NSG Environmental Ltd. The group includes NIS Ltd, NSG Environmental Ltd, and Hold Engineering Ltd, with over 250 employees and annual turnover exceeding £36 million.
• NIS Ltd and Hold Engineering LtdcoreStrategic or Co-development PartnerSister companies within the NIS Holdings Ltd group. NSG collaborates with NIS Ltd for technical capabilities throughout project delivery stages, and partners with Hold Engineering Ltd for combined expertise.
• Lancaster UniversityminorStrategic or Co-development PartnerAcademic partnership for PhD research collaboration on neutron activation analysis for ancient artefacts, with particular emphasis on assessment of gold objects and coins. Dr Joshua Moore acts as industrial supervisor.
• University of ManchesterminorStrategic or Co-development PartnerPartnership through SATURN Centre for Doctoral Training (CDT) for a fully approved, co-funded PhD studentship investigating radionuclide fate during geological disposal of radioactive waste in Lower-Strength Sedimentary Rocks.
• UKAEA (UK Atomic Energy Authority)minorStrategic or Co-development PartnerPartnership through RAICo 1 facility in Whitehaven, a collaborative R&D hub run by UKAEA, NDA, Sellafield, and University of Manchester developing robotics and AI technologies for nuclear decommissioning.
• Cumbria Youth Alliance (CYA)minorStrategic or Co-development PartnerNSG donated £500 to support CYA's Benny Walker Centre development in Workington. CYA is a charity empowering young people and strengthening the youth sector in Cumbria.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Orano: French nuclear fuel cycle and decommissioning major with UK operations. Fellow NWS ESAS Framework partner offering broader integrated nuclear services than NSG's mid-tier scope.
• AECOM: Global infrastructure consultancy with a UK nuclear practice spanning decommissioning, environmental, and engineering services. Competes for larger nuclear framework lots across the NDA estate.
• Jacobs: Global professional services firm with established nuclear and decommissioning practice supporting the UK NDA, Sellafield, and defence clients. Larger-scale competitor for prime contracting on major decommissioning programmes.

Direct peers

• AtkinsRéalis: Global nuclear services and engineering firm and fellow NWS ESAS Framework partner. Competes head-to-head with NSG on UK decommissioning, waste management, and engineering design work for Sellafield, NDA, and Magnox.
• Nuvia: UK-headquartered nuclear services specialist covering decommissioning, waste management, and radiation protection. Fellow NWS ESAS Framework partner competing for the same civil nuclear framework awards.
• Amentum: US-based nuclear and environmental services firm with growing UK nuclear decommissioning footprint. Fellow NWS ESAS Framework partner with comparable offerings in waste characterisation and decommissioning delivery.
• Cavendish Nuclear (Babcock International): Babcock's nuclear division delivering decommissioning, waste management, and facility services across UK civil and defence nuclear sites. Direct competitor for framework work at Sellafield, Dounreay, and AWE.
• Cyclife UK: EDF subsidiary focused on radioactive waste management and decommissioning. Fellow NWS ESAS Framework partner with overlapping capabilities in waste processing and metal recycling.
• REACT Engineering: UK nuclear decommissioning specialist providing engineering, project management, and technical support across the NDA estate. Comparable mid-tier competitor for decommissioning and waste management frameworks.

Emerging players

• Createc: UK nuclear technology and R&D firm specialising in radiation detection, imaging, and characterisation tools. Complementary technology provider with overlap in characterisation workstreams.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/nsg-environmental-ltd
• Xx.com/nsglimited

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 NSG Environmental