About Us

We pride ourselves on our ability to deliver simple solutions to the nuclear industry's most complex challenges.

At NSG, our vision is to be the nuclear industry’s preferred partner and we believe our people are fundamental to achieving this. Our positive working culture is driven by our four core values: passion, integrity, challenge and collaboration. We have a long and proud history of safely delivering cost-effective decommissioning, waste management and land remediation services for the nuclear industry. More recently, we have complemented our core capability with services such as problem definition, requirements engineering, obsolescence management and plant life extension. In addition to this, we also offer expertise in programme and supply chain management, giving our clients complete confidence that their projects are in safe hands.

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Our History

From a micro business specialising in decommissioning to an SME with Tier 2 experience at multiple sites across the UK, we have been delivering services to the nuclear industry for almost 40 years. Click here to find out more about our history.

Our Leadership Team

Our directors are some of the most experienced and respected professionals in the industry, having earned their stripes with organisations including Sellafield, Magnox, AWE and UKAEA. Find out more about our leadership team here.

Our Core Values





Our vision is to be the nuclear industry's preferred partner


From problem definition and strategy development through to land remediation, we are experts in each stage of the nuclear decommissioning project life cycle.

Consultancy Services

Our Consultancy Services team has a reputation for delivering pragmatic solutions and high-quality outputs on time and to budget.

Engineering Solutions

We have successfully supported numerous decommissioning and waste management campaigns with practical engineered solutions.

Site Operations

We operate within some of the UK’s most hazardous facilities, collaborating with our clients and supply chain partners to deliver safe and cost-effective solutions.


Our technical facilities are specifically set up to deliver R&D and testing services to the UK nuclear industry.

Our workshop facilities are made up of 3,300m2 of working area, split into High Bay, Low Bay, Laboratory and D1. The High Bay was designed and built to house full-scale testing rigs. It is fully equipped with water, electrical and compressed air services and is capable of housing test rigs up to 15 metres in height that contain a variety of heavy-duty equipment at a wide range of loads. Serviced by a 20-tonne overhead gantry crane, the High Bay is an ideal location for the construction of full-scale test beds from which underpinning works or integrated works testing can be conducted.


The Low Bay is connected directly to our head office, Scientia House, and includes a 12.5-tonne overhead gantry crane, compressed air, water and electrical supplies. It has housed a number of R&D rigs and currently holds a large-scale sludge manufacturing plant, 250-litre grout plant, 500-litre scale in-drum mixing rig, 3m3 large liner mixing rig, IONSIV cartridge filling rig, screeder and a 33m3 temperature and humidity-controlled sample store. The Low Bay is an ideal facility for testing concepts at a smaller scale ready for scale up to full size.


Fully equipped with modern equipment, our analytical laboratory is available for project experimentation and laboratory-scale trials work. Staffed by a team of qualified consultants and technicians, the laboratory provides scientific testing and formulation underpinning in a controlled environment. The laboratory is furnished with testing equipment to measure shear strength, viscosity, pH, turbidity, particle size distribution, particle density and setting. This allows the laboratory team to provide conclusive and thorough testing of substances on site with accurate results.


The D1 facility is a self-contained unit connected to the High Bay and is home to a fully outfitted welding bay and mechanical workshop. This allows for small mechanical tasks to be carried out on site with a fast turnaround and is also used for minor repair and maintenance tasks for the entire site. Staffed by a team of experienced mechanical engineers and technicians, the use of this workshop allows for components to be removed from systems quickly for strip down and maintenance, fault diagnostics and repair.

Virtual Tour


Are you interested in joining our talented team?

We have a huge variety of opportunities within our many departments, including apprenticeship, graduate and postgraduate positions. As a member of the NSG team, you will be working on diverse and innovative projects that help to shape the future of the nuclear industry. We will support you in your career progression, giving encouragement and providing opportunities for you to develop. Employee engagement is a key focus for us and we have a range of benefits, policies and initiatives to suit everyone. Our comprehensive health and wellbeing programme and our qualified team of Wellbeing Champions were established to ensure our employees’ mental and physical health and wellbeing are always a key priority.

Employee Benefits

Competitive Salary

Industry-benchmarked salaries, paid overtime and discretionary company performance-based bonuses.

Healthcare Plan

Comprehensive company-funded healthcare plan including dental, optical and physical therapies.

Training and Development

Internal and external training and development opportunities for all staff.

Pension Scheme

Five percent employer contribution pension scheme with salary sacrifice option.

Agile Working

Agile working options including home working and flexible working.

Maternity/Paternity Pay

Enhanced maternity and paternity pay, including the opportunity to return to work early, part-time, on full pay.

Life Assurance

Death in service cover equivalent to three times the employee's annual salary.

Annual Leave

Five weeks' annual leave plus statutory holidays and long service increases.

Enhanced Sick Pay

Full pay up to a maximum of 20 weeks in a 12-month period.

Current Vacancies

Employee Spotlights


We strive to not only meet but exceed our customers’ expectations by performing to the highest standards throughout our business.

We have an excellent safety record and are proactive in promoting safety culture throughout all activities at all NSG and client sites. Earlier this year, we were awarded the RoSPA Sector Award for Research and Development for the second consecutive year, which followed on from two consecutive President's Awards, another Sector Award for Research and Development in 2016 and eleven consecutive Gold Awards. As part of our commitment to continual improvement, we benchmarked ourselves against the best in industry in the British Safety Council (BSC) Five Star Audit in 2015 and were awarded Five Stars. Later that year, we were one of just 61 organisations worldwide that were awarded a BSC Sword of Honour for demonstrating excellence in the management of health and safety risks at work.

We have systems in place that are certificated to ISO 45001:2018 and are continuously reviewed and updated to ensure that we continue to meet all regulatory, legal and client requirements while improving our health and safety performance. All staff at all levels participate in safety walkrounds and senior managers participate in the audit programme as we constantly inspect, audit and measure our performance to identify where we can improve. Health and safety are key performance indicators within our business and we have an improvement programme which sets targets that continuously challenge our processes and procedures.

We are committed to providing the highest possible standard of service to all stakeholders. To ensure that this is achieved, we have systems in place that are certificated to ISO 9001:2015 and are continuously reviewed and updated to ensure that we continue to meet all regulatory, legal and client requirements while improving our quality performance. Senior managers participate in the inspection programme as we constantly audit and measure our performance to identify where we can improve. Quality is a key performance indicator within our business and we have an improvement programme which sets targets that continuously challenge our processes and procedures.

We recognise our responsibility to preserve and protect the environment and are committed to continuously improving our environmental performance. We have systems in place that are certificated to ISO 14001:2015 and are continuously reviewed and updated to ensure that we continue to meet all regulatory and legal requirements while improving our environmental management. All work we undertake is assessed for environmental impact and, where that is the case, suitable controls are put in place to remove or minimise the impact. We also work with other stakeholders in the supply chain to help raise environmental awareness and to improve combined performance. Protection of the environment is a key performance indicator within our business and we have an improvement programme which sets targets that continuously challenge our processes and procedures.

At NSG, we take cyber security seriously and are proud to hold Cyber Essentials Plus certification. This accreditation demonstrates our ability to guard against the most common cyber threats and highlights our commitment to cyber security. In addition, we have also achieved the IASME Gold standard; an audited risk-based standard based on international best practices which includes aspects such as policies and procedures, physical security, staff awareness and data backup.

Latest News

Keep abreast of the latest NSG news and company announcements.

NSG to Support Frazer-Nash on ONR Framework

We are delighted to announce that we have been selected by Frazer-Nash Consultancy to be part of its supply chain team on the […]

NSG Supports Local Foodbank

We recently visited Living Waters Storehouse in Chorley and were pleased to present them with a cheque for £1,000 and donate 50 Christmas […]

NSG Christmas Raffle Raises Over £500 for Local Hospice

Earlier this week, we held a Christmas raffle at our Calleva Park offices in Aldermaston. Thanks to the generosity of our staff, over […]

Social Value and Sustainability

As a sustainable business, we are dedicated to supporting our people, our communities, our industry and our environment.

At NSG, our purpose is to sustain a stable, profitable and responsible business that is proud to work safely in the nuclear industry whilst improving the environment and protecting the security of the UK. A large part of this is delivering real social value. One of our core values is collaboration and we truly believe that by working together — with our customers, supply chain partners and local communities — we can make the world a better, safer and more sustainable place to live. As well as supporting members of the community with equal employment opportunities and sustainable incomes, we have policies and procedures in place that make sure everyone is treated fairly, our staff have opportunities to develop and grow, their wellbeing is prioritised, and we are constantly monitoring and striving to improve our environmental performance.

Our Social Value and Sustainability Plan sets out our activities and commitments for the year, ensuring we make a positive social impact and helping our communities to thrive. It is aligned with government recommendations to address key issues such as COVID-19 recovery, tackling economic inequality, fighting climate change, equal opportunity and wellbeing. We have also adopted the relevant United Nations’ Sustainable Development Goals to benchmark our performance and keep us aligned to the bigger picture. These include commitments to economic growth, reduced inequalities, climate action and good health and wellbeing.

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We are proud to call ourselves a COVID-secure workplace. Our response throughout the pandemic has been one of care and clarity, with the vast majority of our staff working from home to protect themselves and their families. We continue to invest in our IT infrastructure to ensure every new and existing member of our team has the necessary equipment and software to deliver their high standard of work and interact with colleagues and customers alike. For the key workers that need to continue working at an NSG or client site, we have implemented further safety protocols such as temperature checks, increased cleaning schedules, additional PPE where necessary and stringent social distancing measures. In line with our standard procurement processes, we continue to use local suppliers where possible to minimise travel and support local businesses.

At NSG, we are committed to the development and growth of our employees and we are proud to have a diverse workforce that includes apprenticeship, graduate, postgraduate and blue-collar roles. We are committed to competitive salaries and provide significant staff benefits packages that include healthcare, social activities and performance bonuses. We also invest heavily in the training and development of our people. Career progression is supported through Personal Development Plans (PDP) and Continuing Professional Development (CPD), as well as our Talent Management and Reward and Recognition initiatives.

We recognise that tackling climate change and caring for the environment is everyone’s responsibility and fully support the national and international goal of reaching net zero carbon emissions by 2050. As part of this, we firmly believe that nuclear power is essential to achieving this goal and endorse the Nuclear Industry Association’s Forty by ’50 initiative, which includes a clear, long-term Government commitment to new nuclear power, driving down the costs of new build projects and maintaining the 2030 targets of the Nuclear Sector Deal. We also believe that the decommissioning work we deliver helps to provide a strong social license for the nuclear new build programme. In addition, we support the Government’s ambition to ‘leave our environment in a better state than we found it’ through its 25 Year Environment Plan. As an ISO 14001-accredited business, we are committed to continuously improving our own environmental performance and challenging our suppliers and clients to improve theirs.

At NSG, we are committed to sustaining an organisation that actively promotes dignity, respect, diversity and equality of opportunity for all and is free from discrimination, harassment or victimisation of any sort. We recognise that employing people from a wide variety of backgrounds will give our organisation the widest possible range of skills, abilities and experience. Our Equality and Diversity Policy and Standards and Expectations guidelines highlight our commitment to these areas and outline the standards we expect from our staff and wider stakeholders.

Wellbeing is a key focus for us and our comprehensive health and wellbeing programme and trained team of Wellbeing Champions were established to ensure our employees’ mental and physical health and wellbeing are always a priority. We promote healthy lifestyles and positive mental health by encouraging our staff to better manage work-life demands and signposting them to information and resources that may help. We also contribute to the wellbeing of our communities through community engagement, financial help and charitable support. Previous activities include volunteering, sponsorship of local sports teams and STEM support to both primary and secondary schools. In addition to this, we also organise regular fundraising events and encourage our employees to support causes that benefit local and national charities and communities.