Experience & Depth Of Knowledge
Our people are our greatest asset
We believe in investing in people’s futures and careers, to help our staff and operatives meet their full potential. This is why we invest in our peoples’ training, ensuring they have the latest and best qualifications and degrees for the work they do, as well as for the work they aspire to do in future.
Our board of directors have all been in the construction space for decades, and have experience at all levels of the business – and the depth of knowledge that comes with it.
Mark Williams
Chairman
Chairman
Mark Williams
Mark has 45+ years of experience in the building and decorating industry, starting his career straight out of school as a trade apprentice.
Having worked his way through various operational levels – from operative to project management – Mark gained a reputation for high standards of workmanship and developed a strong and diverse customer base in both the public and private sector.
Mark took over for his father, Ron Williams, as Chairman of R&M Williams in 1990, and, with the help of his team, has grown the organisation into one of the biggest Welsh providers of key services in building and maintenance.
As Chairman, Mark leverages his experience and knowledge of the industry to deliver great results for our clients.
MANAGING DIRECTOR
MARTYN OSBORNE
Martyn has over 40 years’ experience in the industry and takes the lead on the strategic oversight of the Group businesses. He is committed to ensuring high levels of customer satisfaction, health & safety, and drives a strong social value offering.
Martyn is committed to high standards in delivery. Under his leadership, the business operates in a non-adversarial manner, putting the needs of clients at the forefront, whilst achieving business objectives and sustainable growth for R and M Williams.
During his career, he has led a number of major Plc construction businesses and has also sat for the maximum period on the Board of the RICS in Wales. He currently chairs the CITB in Wales.
Martyn enjoys spending time with his family and sailing.
DEPUTY MANAGING DIRECTOR
CHARLIE SHERLOCK
Charlie first joined us in 2019 as a placement student. Since then he has worked his way through almost every part of the business, from pre-construction and accounts to contracts management. That all-round view serves him well as Deputy Managing Director.
He has led our move into retrofit and decarbonisation. He secured the accreditations and framework places that allow us to deliver this work for councils and housing associations. As a qualified Retrofit Coordinator he knows the detail as well as the strategy, and clients deal with him directly.
Maintenance Director
Marc Gilder
Marc has worked in R&M Williams for 40+ years, joining the company as a trade apprentice and progressing through the ranks within the maintenance division.
As Maintenance Director, Marc leverages his experience and knowledge to expertly program and manage multiple complex schemes at the same time – such as wide-scale kitchen and bathroom replacements, responsive and planned maintenance, enveloping and renewal schemes.
Marc’s reputation and professionalism contribute to R&Ms growth through a high rate of repeat customers for our framework agreements and through our award-winning renewal schemes.
Commercial Director
Martyn Morris
Martyn has 30+ years of experience working in Construction, starting as a Quantity Surveyor, and moving into senior roles, culminating with his assignment as Commercial Director in R&M.
Martyn is responsible for the financial management of new-build construction and development, and large-scale maintenance projects. He has a granular understanding of all aspects of construction work, from inception of a scheme through to completion.
Martyn has particular experience with design and build contracts up to £30m, from both employer and contractor perspectives, which offers our clients peace of mind that their financial needs are considered and kept in mind throughout the commercial lifespan of the project.
Commercial Director
PETER WILLIAMS
Peter joined us in 2026 to lead our Retrofit and Decarbonisation division. He has worked in commercial management since starting as a trainee quantity surveyor in 1990, including more than 20 years with energy efficiency specialist SERS Energy Solutions Group.
That background means he knows retrofit contracts inside out, from procurement and risk to keeping costs under control. He is known for open, collaborative working with clients and the supply chain, and for clear, transparent commercial reporting.
We invest in our people, so they can learn and improve their skills, and lead happier more productive lives
