Professor Lehman studies basic questions related to organization theory. One stream of his research focuses on organizational learning, with an emphasis on understanding the roles of risk, routines, and rules in organizational decision making. The other stream focuses on organizational authenticity, with an emphasis on understanding how audiences respond when they encounter that which they perceive to be authentic. He has conducted his research in a variety of domains, including professional sports, food and dining, healthcare, pipeline and hazardous materials, and exporting.

Professor Lehman teaches undergraduate and graduate courses on organizational behavior, leading teams, and decision making. In 2016, he received the All-University Teaching Award.

Prior to joining the University of Virginia, Professor Lehman served on the faculty at the National University of Singapore. He worked in the pharmaceutical and telecommunications industries before starting his academic career.