Climate Change and Industry Minister Nick Hurd has been given a new role while Claire Perry joins the Business, Energy and Industrial Strategy (BEIS) team.
Mrs May now plans to cut a deal with the Democratic Unionist Party (DUP) to form a Conservative minority government
He took to social media to thank the team.
Ms Perry, MP for Devizes and former Parliamentary Under Secretary of State for Transport, will join BEIS as a junior minister.
A BEIS spokesperson told ELN her responsibilities have yet to be announced.
Greg Clark has retained his role as BEIS Secretary but Margot James and Jesse Norman’s roles haven’t been confirmed.
Michael Gove has returned to the front bench as Environment Secretary.