Kaleb is Co-Director of the National Data Bank for Rheumatic Diseases (NDB), PI for the Rheumatoid Arthritis Investigator's Network (RAIN) Database, and Assistant Professor of Medicine at the University of Nebraska Medical Center. From 2004-2006 Kaleb was at Stanford as an ARHQ pre-doctoral fellow at PCOR and completed his PhD in Physics with Jay Battacharya acting as his primary advisor in 2006. His primary interests revolve around pharmacoepidemiology, health outcomes, quality of life and cost-effectiveness in rheumatology. He spends much of his timing working with and collaborating with others using the NDB, the world's largest long-term observational data bank in rheumatology with over 36,000 patients since 1998.