 
			| Date | Content | 
|---|---|
| ㆍ2006.09- | Director, Institute of Agriculture and Life Science Research, CBNU Professional Bodies | 
| ㆍ2006.06- | Director, Brain Korea 21 Program for Practical Use of Bio Agricultural Technology supported by the Ministry of Education and Human Resource and Development | 
| ㆍ2005.08- | Designated as Laboratory of Excellence by the Ministry of Education and Human Resource Development, the Ministry of Commerce, Industry and Energy and the Ministry of Labor in Korea | 
| ㆍ1996.03- | Director, Research Center for the Development of Advanced Horticultural Technology supported by Ministry of Science and Technology | 
| ㆍ1992.04- | Professor, Dept. of Hort. Sci. CBNU. | 
| ㆍ1991.03-1993.02 | Chief, Applied Research Development, Institute of Genetic Engineering | 
| ㆍ1988.03-1988.12 | Head, Department of Hort. Sci. CBNU | 
| ㆍ1988.03-1988.12 | Head, Department of Hort. Sci. Graduate School of CBNU | 
| ㆍ1987.04-1992.03 | Assistance Prof. in Dept. of Horticultural Sci. CBNU | 
| ㆍ1982.10-1987.03 | Assistant Prof. in Dept. of Horticultural Sci. CBNU | 
| ㆍ1980.03-1982.09 | Full Time Instructor in Dept. of Horticultural Sci. CBNU | 
| ㆍ1978.03-1980.02 | Assistant in Dept. of Horticultural Sci., Chungbuk National Univ(CBNU) | 
| Date | Content | 
|---|---|
| ㆍ2011.09.01-2012.08.31 | Evaluation member of academic award in Kyung Ahm Education and Culture Foundation | 
| ㆍ2011.06.27-2013.06.26 | Advisory committee member of new material specialist in Korean FDA. | 
| ㆍ2010. 10.01-2012.09.30 | Advisory committee member in agricultural sector in National Agricultural Cooperative Federation | 
| ㆍ2009. | Selected Top 100 Scientist by International Biographical Center | 
| ㆍ2008.07-2010. 12 | Concurrent Researcher, National Institute of Horticultural and Herbal Science | 
| ㆍ2008.04 | Committee Member of Streering Committee of New Knowledge Farmer by the Ministry of Agriculture and Fishery | 
| ㆍ2008.04-2010,04 | Chairperson of Chungbuk Seed Committee | 
| ㆍ2008. | Selected Leading Scientist of World by International Biographical Center in Cambridge. | 
| ㆍ2007.11 | General Judging Committee Member of Korea Superior Cultivar by Ministry of Agriculture and Fishery | 
| ㆍ2007.09 | Examining Committee Member for Civil Service Appointment | 
| ㆍ2007.08- | President, Korea Orchid Self-iluminating Gold Committee | 
| ㆍ2007.08-2009.07 | President, Korean Orchid Grower Association | 
| ㆍ2007.07- | Concurrent Researcher, Chungbuk Rural Development Administration | 
| ㆍ2007.06 | Examining Committee Member for Civil Service Appointment | 
| ㆍ2007.07-2008.04 | President-elect, Korean Association for Flower Industry Development | 
| ㆍ2007. 03. | Chairperson of Scientific Committee of 9thAsia-PacificOrchidConference. | 
| ㆍ2007. 01- | Academic Committee Member of Korea Calanthe Society | 
| ㆍ2006.11 | Workshop Organizer on Cell Culture Using Bioreactor by Malaysia Nuclear Agency in Malaysia | 
| ㆍ2006.07- | Concurrent Researcher, National Horticultural Research Institute | 
| ㆍ2006.07 | Judging Committee Member in the field of Agriculture, Forestry, and Fishery for National Scientific Exhibition Contest | 
| ㆍ2006.03 | Examining Committee Member for Civil Service Appointment Test of Chungnam Province | 
| ㆍ2006.02- | Chairperson of Korea Chapter, Federation of Asian Biotech Association(FABA) | 
| ㆍ2005.07 | Chairperson of Screening Committee in the field of Agriculture, Forestry, and Fishery for National Scientific Exhibition Contest | 
| ㆍ2005.06 | Promotion Committee for 9th Asia-Pacific Orchid Conference | 
| ㆍ2005.04 | Examining Committee for Civil Service Appointment Test of Chungnam Province | 
| ㆍ2005.04-2006.3 | Advisory Committee Member of Cheongwon Local Assembly | 
| ㆍ2004.03- | Ambassador of Science and Technology by the Ministry of Science and Technology | 
| ㆍ2003.10- | Guest Professor of Zhezang Forestry University in China. | 
| ㆍ2002.10-2005.02 | Representative, Joint Federation of Korean Science and Technology Societies | 
| ㆍ2002.10- | Active Member, Korean Academy of Science and Technology | 
| ㆍ2002.07-2004.06 | Concurrent Researcher, Rural Development Administration of Chungbuk Province | 
| ㆍ2002.04-2004.03 | Expert Advisor, Council for Agricultural Cooperation of Industry-University , Rural Development Administration | 
| ㆍ2002.04-2003.04 | President of CBN Biotech Co. | 
| ㆍ2002.04- | APOC(Asia-Pacific Orchid Conference) Main Committee Member | 
| ㆍ2002.01-2003.12 | Committee Member, Association of Professional Florist supported by National Office of Seed Management | 
| ㆍ1999.10- | Honorary Professor, Institute of Medicinal Plant Development, Academy of Peking Medical Science in China | 
| ㆍ1997.10-1999.12 | Expert Advisor, Agricultural Research and Promotion Center, the Ministry of Agriculture and Forestry | 
| ㆍ1994.07-1999.12 | Concurrent Researcher, Rural Development Administration of Chungbuk Province | 
| ㆍ1993- | Korean Delegate, Association of Asia-Pacific Micropropagator | 
| ㆍ1987.06-1991.05 | Concurrent Researcher, Rural Development Administration of Chungbuk Province | 
| Date | Content | 
|---|---|
| ㆍ2010. 3 | Chairperson of Judging Committee of 16th Korea Orchid Exhibition | 
| ㆍ2005.04-2007.03 | Scientific Committee Member, Main Council for Nature Protection | 
| ㆍ2005.03 | Judging Member, Korea Orchid Exhibition | 
| ㆍ2005.03- | Committee Member of Technology Supporting Group for the Consulting of Agricultural Products Export. Korea Agro Fisheries Trade Cooperation | 
| ㆍ2005.02- | Standing Board Member, Korean Society for Horticultural Therapy | 
| ㆍ2004.01 | Advisory Committee Member for the Creation of Flower Land at Daejeon | 
| ㆍ2003.04-2004.03 | Technology Reviewing Committee Member for Patent Map, Korean Council for the Promotion of Invention | 
| ㆍ2002.05 | Committee Member, Technology Supporting Group for the Consulting of Agricultural Products Export. Korea Agro Fisheries Trade Cooperation | 
| ㆍ2002.01-2003.12 | Council Member of Expert Organization for Crop Development by National Seed Management Office | 
| ㆍ2001.08 | Committee Member for the Development of Local Government Administration | 
| ㆍ1995.09- | Judging Committee Member for Registration of Korean Native Orchid | 
| ㆍ1995.02- | Scientific Committee Member for Joint Federation of Oriental Orchid | 
| ㆍ1993.09- | Project Leader of Orchid Research Group supported by Korea Science and Engineering Foundation | 
| ㆍ1993-1995 | Practical Planning Board Member for the Promotion and Activation of Rural Economy | 
| ㆍ1990.04-1993.03 | Countermeasure Committee Member for Importing of Agricultural and Livestock Products | 
| ㆍ1989-1990 | Editorial Reviewing Committee Member for the Edition of First Class Agricultural Books | 
| Date | Content | 
|---|---|
| ㆍ2010.05-2011.04 | President of Korean Society for Horticultural Science | 
| ㆍ2010.01 | International Scientific Committee Member of 1st International Orchid Sym. (Taichung, Taiwan) | 
| ㆍ2009.06-2010.04 | President-elect, Korean Society for Horticultural Science | 
| ㆍ2009. | Editorial Board Member of propagation of ornamental plant(sejani) | 
| ㆍ2008. 10- | International Advisory Panel/Editor of Journal of Agrobiotechnology | 
| ㆍ2008.08 | International Advisory Committee Member. 6th International Sym. On In Vitro Culture and Horticultural Breeding, Australia | 
| ㆍ2007.04 | Editorial Board Member of Plant Biotechnology Report(Springer) | 
| ㆍ2007.02-2010.01 | Editorial Board Member of Journal of Process Biochemistry(Springer) | 
| ㆍ2007.08-2009.07 | President, Korean Orchid Grower Association | 
| ㆍ2007.07- | Concurrent Researcher, Chungbuk Rural Development Administration | 
| ㆍ2007.06 | Examining Committee Member for Civil Service Appointment | 
| ㆍ2007.1-2010.02 | Editorial Board Member of Journal of Environmental and Experimental Botany(Elsevier) | 
| ㆍ2006.01- | Editorial Board Member of Journal of Indian Orchid Society | 
| ㆍ2005.08 | Convenor, 27th International Horticultural Congress, Biotechnology | 
| ㆍ2005-2006 | Vice President, , Korean Society for Horticultural Science | 
| ㆍ2004 | Standing Board Member, Korean Society for Plant Breeing | 
| ㆍ2004- | Standing Board Member, Korean Society for Plant Biotechnology | 
| ㆍ2003- | Standing Board Member, Korean Society for Horticultural Science | 
| ㆍ2003- | Standing Board Member, Korean Society for Plant Biology | 
| ㆍ2003 | Planning Board Member, Korean Society for Horticultural Science | 
| ㆍ2003 | President, Korean Society for Plant Biotechnology | 
| ㆍ2002-2004 | Standing Board Member, Korean Society for Flower Research | 
| ㆍ2002 | President- Elect, Korean Society for Plant Biotechnology | 
| ㆍ2001-2005 | Korean Society for Medicinal Plant | 
| ㆍ2001-2003 | Auditor, Korean Society for Horticultural Science Vice President, | 
| ㆍ1999-2001 | Vice President, Korean Society for Plant Tissue Culture | 
| ㆍ1998-2003 | Editor, Korean Society of Plant Biology | 
| ㆍ1996-1998 | Auditor, Korean Society for Plant Tissue Culture | 
| ㆍ1995-2003 | Board Member, Korean Society for Horticultural Science | 
| ㆍ1994-2001 | Standing Board Member, Korean Society for Medicinal Plants | 
| ㆍ1993-1997 | Auditor, Korean Society for Flower Research | 
| ㆍ1993- | Board Member, Korean Society for Plant Breeding | 
| ㆍ1992-1998 | Editorial Board Member, Korean Society for Horticultural Science | 
| ㆍ1991-1995 | Editorial Board Member, Korean Society for Flower Research | 
| ㆍ1990-1998 | Editorial Board Member, Korean Society for Plant Tissue Culture | 
| ㆍ1989-2003 | Board Member, Korean Society for Plant Biology | 
| ㆍ1989-1991 | Executive Member, International Sago Association | 
| ㆍ1985-1998 | Standing Board Member, Korean Society for Plant Tissue Culture | 
| ㆍ1985- | Active Member, American Society of Orchid | 
| ㆍ1981- | Active Member, International Society for Plant Tissue Culture and Biotechnology | 
| ㆍ1980- | Active Member, American Society for Horticultural Science | 
| ㆍ1980- | Active Member, International Society for Horticultural Science |