After completing his BA in Chemistry at Duke University in 1982, Tim worked as a research specialist under Clinton Kilts, Ph.D. and Jonathan Davidson, M.D. in the Department of Psychiatry at Duke. The focus of this laboratory was mainly on dopamine and neurotensin systems and their involvement in schizophrenia, depression and stress. In 1992, Tim relocated to Emory University where he managed the research lab of Clinton Kilts, Ph.D. in the Department of Psychiatry and Behavioral Sciences. The lab continued the work from Duke but also branched out into the fledgling science of neuroimaging. Initially utilizing Positron Emission Tomography (PET) and later moving into functional magnetic resonance imaging (fMRI). During this time, Tim trained in neuroimaging analysis with Scott Grafton, M.D. and John R. Votaw, Ph.D. In 2009, under Kerry J. Ressler, M.D., Ph.D., Tim joined The Grady Trauma Project to aid in the development of a neuroimaging branch of the project.