Raymond Hardy, 34, first threatened to physically harm the employee, then threatened to kill him, police told The Hour.
He was charged with second-degree threatening, second-degree breach of peace and third-degree trespassing, The Hour said.
It was the second time Hardy was arrested in the past two weeks for refusing to leave the train station, The Hour said.
Click here for the story at The Hour.
Click here to follow Daily Voice Stamford and receive free news updates.