The Land Rover 130 was delivered to the Royal Navy Armaments Depot at Coulport in Scotland and will be used for general maintenance, including outdoor lighting and on-site repairs.
The MoD's 'white' fleet senior contract manager, Jenny Steer, said: 'So far, this contract has been a true success story and the delivery of the 10,000th new vehicle demonstrates its scale. By working in partnership with Lex Defence we have seen vast improvements in the management of our 'white' fleet in terms of cost efficiency.'
Lex Defence was awarded a 10-year contract in 2001 to supply vehicles to the MoD throughout Britain. The company is responsible for more than £1 billion worth of MoD contracts.
Vehicles supplied include fire appliances and bomb disposal vehicles that have been built for specialised military operations.