My research is about program understanding and software system evolution, with a particular emphasis on human aspects of software evolution. My work has been published in venues such as FSE, ICSE, ICSME and CSCW, and has been recognized with the ICSME 2022 “Most Influential Paper Award”, which looks at research impact over the preceding 10 years. Our lab here at Brigham Young University is currently exploring software system failures, including understanding failures, learning from failures, and the evolution of software systems based on what was learned.