Grinnell joined RAK Hospitality Holding in 2016 as CFO and became CEO in 2019. The group was established in 2014 by the government of Ras Al Khaimah. Its subsidiaries include RAK National Hotels, RAK Leisure, RAK Hospitality Logistics, Safarak, and Stirling Hospitality Advisors. Grinnell has over 28 years of experience, with a financial background within hospitality. She previously held several roles at PwC, including a leader for Middle East hotels.