English  l  Korean



Started research career in Microbiology with emphasis on beneficial microorganisms.

1972 - 1987

First Senior Lecturer and finally Full Professor in Microbiology at the University of Pretoria, SA.

1987 - 2007

From 1987 to 2007: Head and Director of the Institute of Hygiene and Toxicology in Karlsruhe (Germany)

1989 - 2015

Member of the Advisory Council of the German Food and Nutrition Industry


Since 1990 to present President of the International Committee on Food Microbiology and Hygiene of the IUMS


From 2007 to 2013: full Professor in the School of Life Sciences, Handong Global University.


Since March 2013, Chair Professor, Dept. of Advanced Green Energy and Environment


1 January
Holzapfel Effective Microbes established
21 May ~ NOW
A $ 600,000 scale contract with Better Air(Israel) about transfer of effective microbial technology for environmental purification
12 June
Establishing a US sales subsidiary HEM-ACE with US NutraSource Inc.
22 August
MOU Signed with Lactomason and agreement on technology transfer


1 April
Establishment of HEM Gwanggyo Research Center in Suwon, South Korea.
8 June
Recognized as an affiliated research institute
1 September
Establishment of "Han-dong SaM" joint venture with Pohang Handong Global University, Pohang