Taking stage in theaters every season since his university years, Fırat is among the founders of Moda Sahnesi, Bursa Sanatmahal and DasDas, and continues to act in the plays “Bütün Çılgınlar Sever Beni” at Moda Sahnesi and “Joseph K.” and “Westend” at DasDas.
Mert Fırat also volunteers for various associations and foundations in corporate social responsibility projects. Among the founders of www.ihtiyacharitasi.org, Fırat actively participates in the design, planning and operation of the project.
Known for his volunteer work in sustainable development, Mert Fırat has been named the first goodwill ambassador of the United Nations Development Programme (UNDP) in Türkiye in 2017.