Grinnell has 25 years of experience in the hospitality industry, during which she has worked in over 30 countries. Grinnell joined RAK Hospitality in 2016, before being appointed CEO of the company in 2019 to oversee the group’s portfolio of businesses covering hotel ownership, hospitality logistics, and asset management and advisory services, as well as the RAK Leisure subsidiary. In 2022, the company sold one of its hotel assets—the 715-key all-inclusive Rixos Bab Al Bahr in Ras Al Khaimah—for a total of $209 million to Aldar Properties. In the same year, Marjan, RAK Hospitality Holding, and Wynn Resorts announced a multibillion-dollar integrated resort development on Al Marjan Island.