Under the deal Boart Longyear will be providing 16 employees, including fitters and full-time drilling supervisors, to operate two reverse circulation rigs.
The crews will be responsible for drilling 4800 holes.
Those holes will add up to about 115,200m over the three-year contract.
GEMCO is an open cut mining operation producing high grade manganese ore that is shipped to GEMCO's Tasmanian manganese alloy plant and around the world.
The mine is located on Groote Elyandt, an island in the Gulf of Carpentaria off the northern Australian coast.
It is the largest and one of the lowest cost manganese mines in the world.
The drilling is aimed at continuing to develop the mine.
"This contract was awarded based on Boart Longyear's stro...