He has been working as head of the Plastic, Reconstructive and Aesthetic Surgery Clinic of Selcuk University Hospital since 2009. He still performs his surgical procedures at the same hospital.

Prof. Tosun is one of the establishers of Turkish Society of cleft Lip and palate and member of executive committee. He is also a member of Turkish Society of Plastic Surgeons. Prof. Tosun is a member surgeon of  International Society of Aesthetic Plastic Surgery (ISAPS). ISAPS is the world's leading professional body for board-certified aesthetic plastic surgeons.

He has been working on stem cell based treatments for the past  15 years.