Dr. Fielder has served as a medical missionary to Africa for almost 20 years. Graduating with a Bachelor of Arts (BA) in Chemistry from Williams College in Williamstown, Mass., he earned his Doctor of Medicine (M.D.) degree from Baylor College of Medicine in Houston in 1999. He subsequently completed the Osler internal medicine residency program at Johns Hopkins Hospital in Baltimore, Md., in 2002. 

Dr. Fielder was a consultant physician at AIC Kijabe Hospital in Kenya from 2002 to 2006, overseeing a US government-funded HIV program for nearly 2,000 patients. He then served as a consultant physician at Partners in Hope Medical Center in Lilongwe, Malawi (Africa), from 2009 to 2014. Beginning in 2014 to present he has served as a staff physician, part time, at Maua Methodist Hospital in Kenya. In between his service in Kenya and Malawi, Dr. Fielder served as an assistant professor of medicine at the University of Texas Southwestern Medical School focused on HIV clinical care and education. His handbook, Tuberculosis in the Era of HIV, has been used widely in several African countries.