Sean Johnston, Ph.D., is a Senior Software Engineer at Google, currently working on the Ads team as a front-end software engineer. They earned a Ph.D. in biochemistry from the University of Wisconsin-Madison, where they focused on PTEN, a crucial tumor suppressor protein, and authored a paper on a computational machine-learning predictor for PTEN function with mutations. Prior to their role at Google, Sean worked as a Graduate Research Assistant and consulted in full-stack software development at SteepConsult, supporting biotechnology companies. Additionally, they have experience as a swing dance instructor and in various roles ranging from camp counselor to exterior painter.