He attended Tulane University from 1991–1994 and was on the Metro Conference All-Freshman Team in 1991 and All-Conference Honorable Mention in 1994.
In February 2011, Hartman was named to Tulane's All-Decade Team (1990s), part of the Green Wave's celebration of 100 years of basketball.
In September 2023, Hartman was inducted on his own individual merits into the Tulane Hall of Fame for a second time.
Hartman was named to the inaugural class of his hometown’s Grand Island HS Athletics Hall of Fame in 2024.
Hartman was drafted by the Rapid City Thrillers of the Continental Basketball Association, where he earned All-Rookie honors in 1995.