After five years, our work at HMP Grendon in Buckinghamshire is complete. With over 20 phases of works ranging from administration buildings and ancillary buildings to house wings and corridors across the prison site, our teams have upgraded lighting and general and...
Case Studies
Long-term relationship with Bedford Hospital
Healthcare projects are an important aspect of SJD’s work, helping to make much-needed improvements to hospital services for local communities across the areas we serve. We’ve returned to Bedford Hospital several times over the years to renew out-of-date electrical...
Multi-phase M&E upgrade at Sandy Secondary School
SJD was asked by Ashe Construction to upgrade the electrical services at Sandy Secondary School in Bedfordshire as part of a wider project to accommodate more children at the school. Central Bedfordshire Council’s New School Places programme aims to increase the...
HMP Grendon fire safety infrastructure upgrade
In 2021 Vinci asked SJD to provide a £2.5m electrical upgrade for a major fire safety infrastructure project at HMP Grendon in Buckinghamshire. HMP Grendon is a specialist therapeutic prison with capacity for 300 prisoners, currently housing around 180 men. The prison...
Specialist knowledge in prisons
SJD has been working with contractors such as Vinci Facilities, to deliver maintenance, upgrades and new building work in the prison sector since 2018. Custodial environments require a great deal of sensitivity, knowledge and flexibility. SJD’s experience is extensive...
New Data Centre at Cranfield University
With many staff and students working in a hybrid way, Cranfield University wanted to upgrade its data infrastructure to increase capacity. The University identified a building on its site, previously leased to Santander Bank that would make the ideal location for a...
Office upgrade for MK recycling team
Ashe Construction asked SJD to provide electrical and data services for the refurbishment of a two-storey office block at Milton Keynes Council’s materials recycling treatment and waste transfer station in Wolverton. The project was designed to help the Council meet...
Two awards for Tara
Site supervisor Tara Warner has received not one, but two safety awards while working at Bedford Academy for Ashe Construction. SJD is helping Ashe to build a new £12m teaching block at the school which is due for completion in August. Tara is leading the team which...
Relocation for growth
Aero Tec Laboratories (ATL) and SJD’s relationship spans back 15 years when ATL asked SJD to undertake electrical alterations at their 25,000sq ft building in Patriot Drive, Milton Keynes. As the company developed to become a leading liquid containment specialist...
Luton and Dunstable Hospital expansion
SJD has been working on a number of projects at Luton and Dunstable University Hospital with Parias Construction and Interiors (PCI) recently, as part of the Hospital’s major expansion and refurbishment. Luton and Dunstable University Hospital is run by Bedfordshire...










