The incident happened around 11 p.m. in the rear parking lot of the shopping center on Ventura Boulevard near Willis Avenue, according to the Los Angeles Police Department. The alleged attacker followed the victim down an elevator while he was taking out the garbage.
The suspect stabbed the worker in the lower back before taking off in an unknown car.
The employee is expected to recover.
Further details about the incident, including a possible motive, were not available.