Underhill will run the venue as it completes a “multi-million pound refurbishment” due to be completed in January 2022.
Her appointment marks the first female GM addition in the conference and events hotel’s 45-year history.
Underhill said: “Having followed Hilton Birmingham Metropole’s journey closely throughout my career, I am thrilled to now make my own impact within the property and on its legacy within the events industry.
“The reputation of this hotel is intrinsically linked to the people, and I’m looking forward to leading our highly experienced team to realise our ambitious plans and to expand on our already strong foundations.”
Prior to joining the Hilton Birmingham Metropole, Underhill acted as GM at the Hilton St George’s Park Hotel, where she presided over the England men’s football team’s Euro 2020 basecamp.
She has also previously worked at the Hilton Garden Inn Birmingham and MacDonald Hotels and Resorts’ Craxton Wood venue.