For what company did Cosmo Kramer work and was on strike for over a decade?

Kramer worked at several menial jobs over the years. The only known steady job Kramer had throughout the entire series was in "The Strike", where he went back to work at H&H Bagels after being on strike for over a decade. His union finally settled the strike and he was reemployed. He only worked there for one episode before he was fired. During the time he was working at the bagel shop, he went on strike again because of having to work on Festivus. He also worked part-time as a department store Santa before being fired for spreading Communist propaganda to young children. In "The Bizarro Jerry", he worked at an office, before it is discovered that he has no business education, and that his reports were "nothing but gibberish".