Research has indicated that boards are both important for times of crisis and that boards experience heightened turnover during crisis. This study extends previous literature by aggregating individuals on boards into categories of professional expertise to assess turnover at the level of expertise instead of at the level of an individual. Using a novel dataset of board membership from local boards of health (LBOH), the boards of local health departments in the United States, I show that the composition of professional expertise on LBOH shifts following the start of the COVID-19 pandemic. Specifically, there is a substitution of non-health/science professionals with health professionals. With expertise shifting to align with the health crisis, I show that boards are potentially helpful during crisis because of their ability to reconfigure to acquire the appropriate expertise. I also show that shift in the composition of professional expertise are moderated by crisis severity, political ideology, and team familiarity.