The employee was shot several times around 11:30 p.m. Wednesday, according to SLPD.
Police said the store was open at the time. It closes at midnight.
The employee was taken to an area hospital. At last check, he was still alive.
ABC13 spoke with police, who said the shooting was not the result of a robbery. Instead, they believe it was "personal in nature."
A description of the shooter has not been released.