Yumer qualified from Ploviv in 1994, he then worked in the Military Hospital in Bulgaria for 1 year, following this he worked in the Community Hospital for 2 years.

From 1996 until 2008 he worked in his own private dental practice in Sarnitsa.

Yumer has extensive experience in all aspects of dentistry, he joined Wisdom in 2008 and he has a special interest in endodontic treatments.