A bank teller has been found guilty of taking part in a robbery which was an inside job.

Anna Martha Hein, 37, had been accused, along with a former employee of Bank SA, of stealing $120,000 from the branch she worked at at Mannum, east of Adelaide.

Justin Robert Lundberg, 36, previously was found guilty of aggravated robbery and false imprisonment.

A court jailed him for close to a decade.

Hein's Adelaide District Court trial heard Lundberg bound and gagged another bank employee but kept Hein with him to provide access to the cash at the branch.

Hein's bail was revoked and she is to be sentenced later.