Giannouka joined the Jumeirah Group and became CEO in 2022. She oversees 9,100 people. In February 2023, the group acquired its first property in Switzerland, the Le Richemond Hotel. In June 2023, the group launched Mission 2030, a transformative and realigning expansion plan. It also opened its Jumeirah Makkah in Jabal Omar, which is the group's first property in Saudi Arabia and one of its largest, with 1,033 rooms and suites, along with 88 apartments. Giannouka has over 20 years of industry experience. Before Jumeirah Group, she was president of Asia-Pacific at Radisson Hotel Group and vice president of development for APAC and China at the Rosewood Hotel Group.