Born in 1971 in the Taraklı district of Sakarya, Yeşildağ graduated from Anadolu University, Department of Business Administration in 2005. Yeşildağ, who served in the Turkish Armed Forces Naval Forces Command for twenty-seven years, started his training in calligraphy with calligrapher Fahri Deniz in 2008, when he was on duty in Ankara, and received his ijazah at the end of five years. Yeşildağ, who opened the Bilge Calligraphy art workshop and bilgekaligrafi.com website in Konak, Izmir in 2016, has participated in various group exhibitions since 2017. Yeşildağ was given the Intangible Cultural Heritage Bearer Artist Introduction Card in the field of calligraphy by the General Directorate of Research and Education of Republic of Türkiye Ministry of Culture and Tourism in 2022, and joined the Izmir Culture Route Festival 2023 as calligraphy artist. The artist continues to write beautiful writings on invitations, gift plates, souvenirs; makes calligraphic paintings, and gives calligraphy training.