2008-present Professor of Biostatistics, with tenure, Department of Biostatistics and Informatics, Colorado School of Public Health (CSPH), University of Colorado Denver, Aurora, Colorado
2013-present Senior Biostatistician, VA Clinical Assessment Reporting and Tracking (CART) Program
2013-present Senior Biostatistician, VA Seattle-Denver Center of Innovation (COIN)
1986-1987 Ford Foundation Postdoctoral Fellowship for Minorities, University of Colorado Health Sciences
Center, School of Medicine, Department of Psychiatry, National Center for American Indian and
Alaska Native Mental Health Research.
1977-1978 Graduate Assistant, Biometry Discipline, University of Texas School of Public Health, Houston, Texas.
1978 Research Assistant, Hypertension Detection and Follow-Up Program, University of Texas School of Public Health, Houston, Texas.
1979 Statistician, Summer Internship, National Center for Health Services Research, Hyattsville, Maryland.
1980-1984 Senior Research Assistant, National Heart and Blood Vessel Research and Demonstration Center, Baylor College of Medicine, Houston, Texas.
1983 Biostatistics Instructor, University of Texas School of Allied Health Sciences, Houston, Texas
1984-1992 Assistant Professor of Biometrics, Department of Preventive Medicine and Biometrics, School of Medicine, University of Colorado Health Sciences Center, Denver, Colorado
1987-1996 Adjunct Assistant Professor and Biostatistician, National Center for American Indian and Alaska Native Mental Health Research, Department of Psychiatry, School of Medicine, University of Colorado Health Sciences Center, Denver, Colorado
1989-1990 Visiting Biostatistician, Epidemiology Unit, Centro di Riferimento Oncologico (CRO); Aviano (PN), Italy (also May 1992; May 1994 and June 1995)
1992-2004 Associate Professor of Biometrics, with tenure, Department of Preventive Medicine and Biometrics, School of Medicine, University of Colorado Health Sciences Center, Denver, Colorado
1996-1997 Acting Head, Section of Biometrics and Biometrics Graduate Program, Department of Preventive Medicine and Biometrics, University of Colorado Health Sciences Center, Denver, Colorado
1996-1997 Acting Director, Biometrics Graduate Program, Department of Preventive Medicine and Biometrics, University of Colorado Health Sciences Center, Denver, Colorado
1997-2002 Head, Section of Biometrics, Department of Preventive Medicine and Biometrics, University of Colorado Health Sciences Center, Denver, Colorado
2002-2006 Head, Section of Biometrics and Informatics, Department of Preventive Medicine and Biometrics, University of Colorado Health Sciences Center, Denver, Colorado
2004-2008 Professor of Biometrics, with tenure, Department of Preventive Medicine and Biometrics, School of Medicine, University of Colorado Health Sciences Center, Denver, Colorado
June-July 2006 Visiting Faculty, Rice University Summer Institute of Statistics, Houston Texas
Sept-Nov 2006 Visiting Scientist, International Agency for Research on Cancer, Lyon France
Co-Investigator with the Denver-Seattle VA Center of Innovation