The Tennessee government chief executive is called Governor.
The chief executive of the United States is called the President. The branch of government he represents is called the executive branch.
There are different titles for the chief executive. In some countries the chief executive is call president. In many companies, he or she is called the chief executive or chief executive officer.
the Governor
The chief executive of Wyoming is called the governor. In 2014, the governor of the state was Matt Mead, a Republican. He was inaugurated in 2011.
The Governor
The plural of "chief executive" is "chief executives"
CEO , chief executive officer
Mayor's office
Individually, chiefs, executives, officers. Collectively, Chief Executive Officers
Chief Executive Officer
Mayor