<Li> Sebastian Arcelus as Jay Whitman , Elizabeth 's current chief of staff and previous senior policy advisor ( season 3 -- present ; recurring season 1 -- 2 ) . In season 3 , it is revealed that Jay 's busy schedule working for the Secretary has strained his marriage . He is currently separated from his wife Abby , who maintains custody of their daughter Chloe . Jay is promoted to chief of staff in season 4 . </Li>
what is jay 's job on madam secretary
chief of staff and previous senior policy advisor