Work on the new 80,000 sq ft building, which will be situated at the current police site at Butterley Hall in Ripley, is expected to start in July, with an anticipated completion date of summer 2016.
B&K is understood to have beaten Thomas Vale and Willmott Dixon to the shared HQ project in a closely fought competition.
The £14m build budget for the steel-framed, three-storey building also includes some demolition of several existing structures.
Alan Charles, Police and Crime Commissioner for Derbyshire, holds responsibility for the police estate.
He said: “This is a major step in the development programme and it is fitting that a Derbyshire company has been awarded the contract thereby helping the local economy.”
The sale of the Fire and Rescue Service HQ, currently at Littleover, Derby will help fund the Fire and Rescue Authority’s contribution to the new build along with a grant from the Department for Communities and Local Government.
The police are covering a large share of the cost of the new building from savings that they have already made, which will help minimise the impact on future budgets.