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1978.03 - 1982.02 ¼­¿ï´ëÇб³/ÀüÀÚ°øÇÐ/Çлç
1982.03 - 1984.02 ¼­¿ï´ëÇб³/ÀÇ°øÇÐ/¼®»ç
1984.03 - 1989.02 ¼­¿ï´ëÇб³/ÀÇ°øÇÐ/¹Ú»ç

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1982.05 - 1989.07 ¼­¿ï´ëÇб³º´¿ø/¿¬±¸¿ø(ÀÇ°øºÎ±âÁ¤)
1989.08 - 1991.05 Univ. of Utah Artificial Heart Research Laboratory/Staff Engineer
1993.12 - 1994.12 Univ. of Utah Dept. of Pharmaceutics/Visiting Prof.
1991.05 - ÇöÀç ¼­¿ï´ëÇб³ ÀÇ°ú´ëÇÐ/ÀüÀÓ°­»ç/Á¶±³¼ö/ºÎ±³¼ö/Á¤±³¼ö
1995 ~ ÇöÀç ´ëÇÑÀüÀÚ°øÇÐȸ/Á¤È¸¿ø
1995 ~ ÇöÀç ASAIO/Member
1995 ~ ÇöÀç IEEE EMBS/Member
2004.1.~ 2005.12. ´ëÇÑÀÇ¿ë»ýü°øÇÐȸ/±âȹÀÌ»ç