"Ken McKay has been hired as senior adviser to support the delegate operations team," said a statement issued by the Trump campaign.
He is ideally positioned to further bolster the Trump campaign's field efforts, it said.
"Ken has a proven track record in winning state political races. He will support our delegate operations team and bolster our ground game efforts. He brings tremendous experience to the job, and I know he is up to the task of working with my team," Trump said.
McKay had previously held several roles with the Republican National Committee and the Republican Governors Association including under former Chairmen and former presidential candidates, Bobby Jindal and Chris Christie.