Marc Short, a veteran Republican strategist who has guided the political network backed by the conservative billionaires Charles and David Koch, is joining Sen. Marco Rubio's presidential campaign in a senior role.

Nabbing Short is a major coup for Rubio as the Florida Republican works to rapidly build out his campaign to compete in the coming slew of primary contests. As president of Freedom Partners, the business chamber that serves as the financing arm of the Koch political network, Short has essentially overseen a quasi-political party. During his five-year tenure, the organization has built out a robust network of organizers and activists on the ground and has made deep investments in data and technology. Through his position, he has developed relationships with some of the wealthiest donors on the right, some of whom are now backing Rubio's campaign. Before joining Freedom Partners, he served as chief of staff for the House Republican Conference under Rep. Mike Pence (R-Ind.).

Short's move to the Rubio team, where he is expected to serve as senior adviser, was first reported by Politico.

"Marc has been a valued leader and contributor to Freedom Partners and our network's success for the past five years," said Mark Holden, general counsel of Koch Industries, who chairs the board of Freedom Partners. "We thank him for his dedicated service and wish him continued success in the future."

The Koch political network, which has set a goal of spending nearly $900 million in the run-up to the November elections, is not expected to jump into the GOP nomination contest as it currently stands. Among the hundreds of donors who contribute to the operation are supporters of both Rubio and Sen. Ted Cruz of Texas.