Linsey Marr is the Charles P. Lunsford Professor of Civil and Environmental Engineering at Virginia Tech. Her research group studies pollutants in indoor and outdoor air. She is especially interested in emerging or nontraditional aerosols such as microorganisms and engineered nanomaterials and how they are transformed in the environment. One of a small number of scientists studying the airborne transmission of viruses before the COVID-19 pandemic, she became a sought-after authority on such issues as effectiveness of masking and social distancing and was influential in persuading the World Health Organization to change its COVID guidance to state that it could be transmitted by aerosols as well as droplets.

Marr is a fellow of the American Geophysical Union, the American Association for Aerosol Research, and the International Society of Indoor Air Quality and Climate. In 2023, she was elected a member of the National Academy of Engineering.