K. F. Thomas Gurukkal is the Chief Trainer and proprietor of Kadathanadan kalari sangam. He was trained by M.A. Vijayan Gurukkal, the founder of the Sangam. He also learned martial art from various teachers such as Sri V. Sreenivasan Gurukkal, V.P Rakhavan Gurukkal Vadakara, Sajeevan Gurukkal. He also went all the way to Kanyakumari to learn kalaripayattu from Mani Gurukkal.