Grinnell was appointed CEO of RAK Hospitality Holding in 2019, having joined the company as CFO in 2016, where she was in charge of the company’s finance and treasury departments. In February 2024, RAK Hospitality Holding partnered with Accor to inaugurate the Pullman Resort Al Marjan Island, the first Pullman resort in the U.A.E. This was a rebrand of Marjan Island Resort & Spa, which the group acquired in August 2023. Grinnell began her career at Andersen’s U.K. and U.S. divisions before joining PwC in 2001.