H.J. "John" Park was a city council member representing District 2. He was first elected in 2014 and was in office for two terms. He resigned from his council seat to run for mayor.

John is a technical consultant for surveillance of nationally notifiable diseases at the CDC and state health agencies. He used to be a contractor for the Centers for Disease Control (CDC) at Northrop Grumman, to work on bioterrorism preparation at the CDC, and to work as a technology consultant for IBM.

John is originally from South Korea. He and his family fled to the United States when he was six. He attended Decatur High School. He has a Bachelor's degree in business administration from Emory University. He lives with his wife, Morgan Harris, near his parents in Brookhaven.