Mr. Gross is an epidemiologist at the Baltimore City Health Department. He collects, analyzes, and maps data for several youth and trauma services programs. In addition, he assists with overdose prevention and space-time analysis: https://github.com/bchd/Nonfatal-Overdose-Surveillance. He also launched the Health Department’s web map gallery (www.baltimorecity.gov/healthmaps). His background includes a master’s of public health in epidemiology from the University of Michigan Ann Arbor and a graduate certificate in geographic information systems (GIS) from Johns Hopkins Advanced Academic Programs.