The attack happened on Cheyenne Drive just before 4 p.m. Thursday.
According to investigators, a man walked into the subdivisions business office and briefly spoke to the agent. Police said he pulled out a hand gun, robbed her and forced her into a bathroom.
The man tried to sexually assault the agent, but she fought back, police said. After a brief struggle, the woman ran out through a back door, police said.
Police are still looking for the attacker. Anyone with information is asked to call Cobb police at 770-499-3945.