Trump's moves will add two experienced women to a senior team that has been predominately male.
Conway will be a senior adviser to campaign chairman Paul Manafort and part of the national polling team that is headed up by Tony Fabrizio, the campaign said in a statement announcing the new moves.
“Kellyanne is a tremendous asset to our rapidly-expanding campaign team. She is a data and messaging expert and terrific on TV. It is great to have her on board," Trump said in a statement.
Conway previously headed up Keep the Promise I, a pro-Cruz super PAC that ran ads hitting Trump.
Giorno's new portfolio will "include developing and executing the general election strategy for Florida, and working with the national political director," the campaign said.
Trump said Giorno is a "valuable asset to my team and a consummate professional."