Dr. David Kaiser is a public health and preventive medicine (PHPM) specialist, associate medical director at Montreal Public Health, director of the PHPM residency training program at McGill University, and vice-president for continuing professional development at the Quebec association of preventive medicine specialists (ASMPQ). He also gives back to the community as a board member of Equiterre and scientific advisor at Percolab Coop. Dr. Kaiser has worked for nearly a decade in the domain of environmental health, leading public health initiatives in housing, environmental noise, air quality and climate change. During the pandemic, he managed the public health response in a variety of challenging contexts, including prisons and essential public services. He also developed innovative approaches to community engagement.