The new building, which has reached its highest point in construction terms, will be home to the Defence College of Logistics, Policing and Administration.
It will cover areas including catering, supply, transport and military human resources.
Skanska Managing Director, Terry Elphick, said: “We are delivering this large project on time and on budget. Our collaboration with our customer, the DIO, and the MOD as end customer, is positive and productive.
“We are also working with local suppliers and employing local people to benefit the community and local economy.”
The College will also enable the MOD to train personnel more efficiently and effectively so that they can provide the best possible support for military operations.
On completion, the developed site will also provide high-quality accommodation in a series of ‘villages’ – one for junior ranks, one for officers and one for senior non-commissioned officers (SNCO).
Trainees will also enjoy sports and recreation facilities, bars, officers’ and SNCO messes, as well as other supporting amenities. There will also be a Royal Logistics Corps museum.
Leo O’Shea, Chief Operating Officer, DIO, said: “DIO supports service personnel by providing a fit-for-purpose estate and accommodation so we’re happy to be undertaking this project with Skanska.
“The new world-class buildings, such as the College, being delivered by the DIO for the MOD, will replace outdated buildings and provide our Services personnel with opportunities to learn from each other in facilities fit for the 21st Century.”