in the box seat
In the most desirable, superior, or auspicious position available. Primarily heard in Australia, New Zealand. This latest promotion really puts me in the box seat.
in the box seat in an advantageous position.
in the ˈbox seat (AustralE, New Zealand, informal) in a position in which you have an advantage: Australia is in the box seat to reclaim the trophy following its record win over Ireland.