Senior researcher Armenian Institute Agriculture, Echmiadzin, 1980—1989; science leader Technological Institute Amino Acids, Minister Medicine & Biological Industry Union of the Soviet Socialist Republics, Yerevan, 1989—1993; president Research & Industry Center Photosynthesizing Organisms, Feed Additives & Physiologically Active Compounds, since 1991; director Yerevan Vitamin Plant, 1998, director of Armenian Institute Biotechnology, Yerevan, 1998—2008; deputy director Nairit Chloroprene Rubber Plant, since 2000; Expert Council Chemistry & Petrochemistry Commonwealth of Independent States Countries, Moscow, since 2002, Expert of FP6, FP7, Horizon-20020, ERA.NET and International Cooperation (InCo) programs of European Union, Brussels, since 2003; Contributor articles to professional journals (J. Clean Technologies & Environmental Policy award, 2008).