Who are MDSI Group?
MDSI Group may have officially formed in 2023, but our roots go all the way back to 1991. Our chairman’s very first major venture was a national security contractor for Bellway Homes PLC, and he later expanded those services to other house builders and even the Prison Service.
Back then, computers were just starting to make their mark, Google was in its early days, there were only five TV channels in the UK, and mobile phones were just becoming a thing. It’s amazing to think how much technology has evolved in such a short time.
Building on that early innovation, we became internet pioneers—launching the first truly national directory of businesses, becoming the largest domain holder in the UK, and eventually branching into international acoustics and audio systems design.
MDSI Construction was one of the first companies launched under the MDSI umbrella. We strategically acquired K Construction—a building firm established over 30 years ago by our Building Director—which has successfully completed projects nationwide, from northern Scotland to the far southwest of England and everywhere in between.
In 2024, MDSI acquired HNB Construction Services and embarked on a rebrand, fully integrating HNB into the MDSI brand by early 2025. We take immense pride in our work. Today, MDSI Construction is managed daily by our Managing Director, Sue Birchinall, who joined us after more than six years with HNB. Our head office is now located in the former HNB offices at Mixbury, on the borders of Northamptonshire, Oxfordshire, and Buckinghamshire, alongside our base in the Middlesbrough area.
MDSI Property & Development was established alongside the inception of the MDSI Group, with the goal of acquiring and building our own homes for sale—a venture that has already proven successful.
We swiftly secured three sites in our “homeland” region in northern England, followed by the acquisition of former hunt kennels at Stratton Audely in Oxfordshire and a stunning site at Lower Tysoe in Warwickshire.
MDSI Bespoke Joinery was formed based on feedback from several architects and clients, we launched a bespoke joinery workshop. We discovered that not only is custom joinery in high demand, but it also enables us to have tighter control over our builds.
At our newly acquired premises in the northeast, we manufacture everything from staircases and door casings to SIP panels and roof trusses. Our Building Director, a seasoned joiner with over 35 years of experience, began his career straight out of school as an apprentice and became self-employed just three weeks before his 21st birthday.
In addition to our bespoke offerings, we also produce a wide range of standard joinery items to order.
MDSI Acoustics was formed because we possess extensive, in-depth expertise in acoustics—a claim few companies can make. Our chairman is a fully qualified acoustician and audio consultant who has worked internationally, from the superclubs of Ibiza to the recording studios of London.
In today’s construction landscape, acoustics often take a back seat. With room sizes becoming increasingly extreme and construction methods focused on ease and cost, architects frequently overlook essential acoustic principles. This oversight can lead to issues such as fatigue, diminished concentration, and even health problems.
We have the capability to design and build almost any acoustically tuned environment—from a fully equipped cinema to a state-of-the-art recording studio.