| 1981 | Clinical Asst, Mboya Health Centre, Rusinga Island, Lake Victoria, Kenya |
| 1989-1991 | Clinical Instructor, Surgery, UT Southwestern Medical Center, Dallas |
| 1989-1992 | Attending Surgeon, Veterans Affairs Medical Center, Dallas, TX |
| 1989-1992 | Asst Clinical Professor, Surgery, UT Southwestern Medical Center, Dallas |
| 1992-1999 | Asst Professor, Urology and Medicine, U Miami, Miami, FL |
| 1992-1999 | Chief of Urology, VA Medical Center, Miami, FL |
| 1994-1999 | Director, South Florida Prostate Cancer Project, Miami, FL |
| 1999 -present | President & CEO, The Krongrad Institute |
| 2000-present | President & CEO, The Prostate Cancer Project |
| 2006-present | Medical Advisor, The American Prostate Cancer Initiative |
| 2007-present | Chairman, The Prostate Cancer Project |
| 1989-1991 | Dornier Scholarship, American Foundation for Urologic Disease |
| 1995 | Commendation, Nutritional Prevention of Cancer Trial |
| 1997 | Chairman, South Florida Prostate Cancer Forum, American Cancer Society |
| 1999 | Health Care Hero, Greater Miami Chamber of Commerce |
| 2007 | Heavy Hitter in Health Care, South Florida Business Journal |
| 2006-present | Regular Guest Contributor, The Miami Herald |
| 1992-1998 | Editorial Board, Urological Research |
| 1993-present | Reviewer, Journal of Urology |
| 1993-present | Reviewer, Journal of Andrology |
| 1996-present | Reviewer, Cancer Research |
| 1996-present | Reviewer, Cancer |
| 1997-present | Reviewer, Disease Management and Clinical Outcomes |
| 1998-present | Reviewer, Urology |
| 1998-present | Reviewer, Medical Care |
| 1999-present | Reviewer, Urologic Oncology |
| 1999-present | Reviewer, The Prostate Journal |
| 2000-present | Reviewer, Oncogene |
| 2000-present | Reviewer, The Prostate |
| 1996 | Member, Prostate Cancer Consensus Conference, World Health Org |
| 1996-1999 | Member, Molecular Biology & Technology Committee, Amer Urol Assoc |
| 1997 | Member, CaPCURE Research Prize Committee, Amer Urol Assoc |
| 1997-1998 | Member, Gov’t Relations Committee, Society for Basic Urologic Research |
| 1997-2000 | Member, Research Committee, American Urological Association |
| 1999 | Member, 2nd Int’l Consultation on Prostate Cancer, World Health Org |
| Society for Basic Urological Research |
| Am Assoc for the Advancement of Science |
| New York Academy of Sciences |
| The Endocrine Society |
| Florida Urological Society |
| American Urological Association |
| European Association of Urology |
| Society for Urologic Oncology |
| Society of Laparoendoscopic Surgeons |
| Société Internationale d’Urologie |
