These roles are: (1) chief of state, (2) chief executive, (3) chief administrator, (4) chief diplomat
examples
1. As chief of state, the president presides over commemorations of war heroes, throws out the first pitch at baseball games, and attends funerals of world leaders, among other duties.
2.Chief Executive is a term used for Presidential or Prime Ministerial powers given by a constitution or basic law, which allows its holder to implement policy, supervise executive branch of government, prepare executive budget for submission to the legislature, and appoint and remove executive officials.
3. Providing input for business and strategic planning. Setting goals for departments and individual managers. Collaborating with colleagues to implement policies and develop improvements.
4.The president is the nation's chief diplomat. He or she deals directly with the heads of foreign governments.