About Us

About MSS Group

MSS Group delivers integrated technical and compliance-driven solutions across water hygiene, environmental consultancy, facilities management and specialist industrial services. The four operating companies – MSS Water, MSS Environmental Services, MSS Facilities Services and MSS Group – work in close alignment, combining accredited methodologies, sector-specific expertise and hands-on delivery experience to support clients in highly regulated markets where compliance, safety and reliability are critical.

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The MSS Difference

MSS Group has established a strong reputation for responsiveness, proactive client management and consistently delivering the best possible outcomes. Our approach is rooted in long-term collaboration, where we prioritise client objectives, build trust and deliver services that are both compliant and operationally effective.

Operating across both public and private sectors, MSS supports industries where accreditation, safety and regulation are non-negotiable. Our four divisions – MSS Water, MSS Environmental Services, MSS Facilities Services and MSS Waste – offer a comprehensive, integrated service model. Together, they provide a consultancy-led solution that gives clients access to a wide range of technical disciplines through a single, coordinated supplier.

Our teams are highly trained, experienced and proven in managing complex projects. We are particularly well-placed to serve sectors with demanding logistical or compliance challenges, where continuity of service and specialist knowledge are essential. For many of our clients, the barriers to switching providers are high. Retention and contract awards are based on trust, performance and our ability to consistently deliver to the highest standards in critical, often regulated environments.

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Senior Leadership Team

Bill Mayne

CEO

Details

Bill co-founded MSS Group in 2005. He has over 35 years experience of working in a variety of service industries. Bill is married to Alison and has two children.

“I make a point of finding out about each and every client we work for, what’s happening with their business and what’s important to them.”

Jonathan James

Managing Director

Details

Jonathan has risen through the ranks for MSS to join the Senior Leadership team in 2020. He has worked in the asbestos industry for over 20 years as both a consultant and operational manager for removal works. Jonathan brings a wealth of experience to the role and has successfully overseen the strong growth of our asbestos removal division.

Jonathan Jones

Group Director

Details

Jonathan has been at MSS since its inception in 2005. He has over 20 years experience working in the compliance and facilities services sectors and is a
Certified Member of the Institute of Workplace and Facilities Management (CIWFM).

An experienced Director at board level Jonathan provides support to all Group companies; this includes financial modelling, tendering, budgeting, and all aspects of financial and other systems reporting.

Jonathan is also responsible for the company’s IT infrastructure, systems and strategy.

“Success can only be delivered by ensuring a quality and value for money service".

Darren Phelan

Business Unit Lead - Consulting

Details

As Business Unit Lead for MSS Consulting, Darren is responsible for management and development of the Group’s UKAS Accredited Asbestos Consultancy and PAS2035 Retrofit Service offering. He has additional responsibility for the management of bids and tenders, and the marketing function for the Group. Since joining MSS in 2015, Darren has overseen the strategic implementation and growth of new services and clients as the needs of the industries we serve have changed over time.

Rhys Hatherall

Business Unit Lead

Details

Rhys joined MSS in 2021 and leads the business, overseeing its recent re-branding, and development of the divisions service capabilities and client base. He has brought together a dynamic team of water treatment specialists to ensure that our clients receive a top class, compliant service.

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MSS is part of the RSK group of companies

The RSK Group is a leading integrated environmental, engineering and technical services business offering bespoke end-to-end solutions to a variety of sectors. Headquartered in the UK but with an established presence throughout Europe, Africa, the Middle East and Asia, RSK helps organisations around the world achieve their business aspirations in a sustainable and efficient manner.

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Interested in working with us?

You’ll find we get closer to your business, give you more insight, more reliability, more ideas, more support and more flexibility than most other service providers.

If you’d like to find out how we can help your business, get in touch today.

Email us: enquiries@themssgroup.co.uk