| VISITING CONSULTANT IN MOLECULAR BIOLOGY Pain Management Center, St. Luke's Medical Center
 (May 1, 2000 - present)
 
 
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| DEAN, College of Medicine
 Pamantasan ng Lungsod ng Maynil
 (June 2008 - May 2010)
 
 
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| PROFESSOR OF BIOCHEMISTRY & NUTRITION Department of Biochemistry & Nutrition, College of Medicine
 FEU - Nicanor Reyes Medical Foundation
 (May 1997 - May 2007)
 
 
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| HEAD, DEPARTMENT OF BIOCHEMISTRY & NUTRITION Department of Biochemistry & Nutrition, College of Medicine
 FEU - Nicanor Reyes Medical Foundation
 (May 1997 - April 2004)
 
 
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| CHAIRMAN OF CANCER RESEARCH Cancer Institute, St. Luke's Medical Center
 (January 1, 1999 - December 2000)
 
 
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| ASSISTANT CHAIRMAN OF RESEARCH Cancer Institute, St. Luke's Medical Center
 (April 15, 1998 - December 30, 1998)
 
 
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| CO-CHAIRMAN, ST. Luke's Breast Cancer Study Group Cancer Institute, St. Luke's Medical Center
 (1998)
 
 
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| CONSULTANT, MOLECULAR DIAGNOSTIC LAB. Bureau of Research and Laboratories
 Department of Health
 (April 1997 - December 1999)
 
 
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| SCIENTIST CONSULTANT Cancer Research Laboratory
 Research and Biotechnology Division
 St. Luke's Medical Center
 (October 1996 - October 1998)
 
 
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| ADJUNCT RESEARCH SCIENTIST DNA Laboratory and Electron Microscope Facility
 Research and Biotechnology Division
 St. Luke's Medical Center
 (July - September, 1996)
 
 
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| RESEARCH FELLOW Division of Hematology/Oncology, Department of Medicine
 UCLA - San Fernando Valley Program
 University of California, Los Angeles, California, USA
 (July 1992 - May 1996)
 
 
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| RESEARCH FELLOW Section of Oncology, Department of Medicine
 College of Medicine, Boston University
 Boston, Massachussetts, USA
 (November 1991 - July 1992)
 
 
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| INTRUCTOR-A IN MEDICAL BIOCHEMISTRY Department of Biochemistry, College of Medicine
 FEU - Nicanor Reyes Medical Foundation
 (1985 - 1997)
 
 
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| PART-TIME INSTRUCTOR IN MEDICAL BIOCHEMISTRY Department of Biochemistry
 Fatima College of Medicine
 (1985 - 1991)
 
 
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| PART-TIME INSTRUCTOR IN MEDICAL BIOCHEMISTRY Department of Biochemistry
 Virgen Milagrosa Educational Institute
 (1985 - 1989)
 
 
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| PART-TIME INSTRUCTOR IN ZOOLOGY Department of Zoology
 Philippine Normal College
 (1979 - 1980)
 
 
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