Since Season 9, Berta has worked for Walden. In "Nice to Meet You, Walden Schmidt", Berta met Walden when he was naked, when he said 'I'm Walden', she replied 'I'm inpressed'. In "People Who Love Peepholes", Berta agrees to be his live in housekeeper. Taking Alan's room. In "Big Girls Don't Throw Food", Berta is very angry that Walden let Alan stay for 'a few days', calling him 'Human Herpies'. In "Nine Magic Fingers", Berta moves out when Walden tells Alan he wants him to live with him permnantly. Despite this, she continues cleaning at the beach house.