WASHINGTON (AP) — President-elect Joe Biden nominated his former rival Pete Buttigieg as secretary of transportation on Tuesday and intends to choose former Michigan Gov. Jennifer Granholm as his energy secretary.

Biden also plans to tap Gina McCarthy, a former Environmental Protection Agency chief, for the powerful new position of domestic climate chief to run his ambitious climate plans across the federal government.

All three will be central to Biden’s plan to remake the country’s automobiles and transportation systems to quickly cut climate-damaging petroleum emissions.

Buttigieg, 38, would be the first openly gay person confirmed by the Senate to a Cabinet post.