- Justice Brown is a board member and volunteer for Star of Hope, which provides food and shelter for those in need.
- He currently serves as the past board chair of the board for KSBJ radio station in Houston after serving as its vice chair and then chair for six years.
- For the past four years he has served as the secretary of the board of Spring Branch Family Development Center, an organization that provides enrichment and support services to a historically under-served population.
- He is also a former board member of Houston Habitat for Humanity; he served as its vice-president when it built one hundred affordable homes in one week and later as its president.
- He served for two years as the chairperson of the Memorial High School Community Network, a coalition of parents, teachers, and administrators with a common objective–to foster a school and community environment that encourages teenagers to choose and follow a healthy, alcohol-free and drug-free lifestyle.