Construction is set to start in early 2025 and finish in late 2027 on the complex £210m Winnall roundabout scheme.
Programmed works include the creation of four traffic lanes in each direction of the M3 as well as building a same-direction free-flow link between the M3 and A34.
Also VolkerFitzpatrick will be constructing three new bridges, rearranging the main junction 9 roundabout and providing a number of other structures including new underpasses.
VolkerFitzpatrick is taking steps to minimise its environmental impact by reusing existing sub-base from the project.