If a State Senate's Sergeant- at- arms that supposedly retired and began working for a nonprofit organization. He did not report that he keep his...

If a  State Senate's Sergeant- at- arms that supposedly retired and began working for a nonprofit organization. He did not report that he keep his current position at the state. Answer the following question:

Is it ethical for former  state employee to lobby on behalf of a private entity? Should state employees have the same first amendment rights as every other citizen when it comes to lobbying? what ethical theory would support allowing such an arrangement? What ethical theory can be cited to oppose such lobbying?