He is performing the role of chief executive by choosing his staff to run the government. There are three branches of government: legislative; executive and judicial. There is a balance of power among the three branches. The executive branch carries out laws passed by congress within a budget approved by congress. The president has certain powers outlined within the constitution and the authority to appoint people to run the cabinet departments. Congress must approve the appointment of cabinet secretaries.
Cabinet members are appointed by the President; with Senate approval.
The president has the authority to appoints members of the cabinet.
The president appoints federal judges, ambassadors, cabinet members and various "czars".
The President names his cabinet members who must be confirmed by the US Senate before they can take office.
The President of the United States appoints Cabinet members to assist in the carrying out of the Presidential power of day to day operations in the White House. Members of the Cabinet in managerial positions have to be approved by Congress.
congress
The Congress.
The U.S. President's Cabinet has no elected positions, so no one elects them. The President appoints them based on his own reasons regarding their areas of expertise or career/personal history. The Cabinet is truly the President's "team." Their chief duty is to advise the President, however they have many other duties as well.
The Congress.
Senate?
The President of the United States.
the president appoints and the senate approves