Defense Doctoral Dissertation Thesis for Ph.D. Degree in General Surgery- (thesis on treatment of gall bladder and liver diseases and mechanical jaundice)-Russian Scientific center of Surgery-Candidate of Medical Science, Moscow, RF, November, 1990
Doctoral Research study at chair of Surgery of COLIAMS, Moscow affiliated at the Emergency Hospital N53 and N1 of the Ministery of Railways, Moscow, RF, 1987-1990

Medical Doctor-Yerevan State Medical University (YSMU)- Diploma with Honor, Yerevan,  RA, September, 1978-1984  

Internship in General Surgery-Leningrad Military Medical Academy, Leningrad, RF, September, 1984-1985

Professor of General Surgery Chair, YSMU, Yerevan, RA, 2011-to present
Head of 1st Surgical department, “Nairi” Medical Center, Yerevan, RA, 2004-to present
Head of department of Genera! and Laparoscopic Surgery -"Surb Nerses Mets" MC (nowdays: Izmirlian MC) and associate professor of General Surgery Chair-YSMU, Yerevan, RA, 2000-2004

Established and became the head of Laparoscopic Surgery service at "Emergency Medicine" Medical Center, Yerevan, RA, 1997-2000

Senior researcher at Sklifosovky Research Institute of Emergency Medicine, Moscow, RF, 1994-1997

Head of surgical department of Yerevan Hospital N8 Postdoctoral research fellow in General Surgery- NIH named after academician S.Avdaibekyan of the MH, Yerevan, RA, 1990-1994 

Reaserch assistant of Surgery of COLIAMS, Moscow affiliated at the Emergency Hospital N53 and N1 of the Ministery of Railways, Moscow, RF, 1987-1990

Surgeon at Yerevan Railway hospital, Yerevan, RA, 1985-1987

Research fellow-General Surgery- Leningrad Military Medical Academy, Leningrad, RF, 1984-1985

Postdoctoral Dissertation thesis defense on laparoscopic surgery for acute cholecystitis.-Russian Scientific center of Surgery- awarded with Doctor of Medical Sciences degree, Moscow, RF, June, 1997
Postdoctoral Research study ( General Surgery) - Sklifosovky Research Institute of Emergency Medicine, Moscow, RF, 1994-1997

Author of 43 published scientific papers and 3 innovation proposals.