The mayor shall be the chief executive officer of the town, and subject to the supervision of the board of commissioners, shall perform all duties pertaining to such office. He shall do and perform all duties provided or prescribed by law or by the ordinances of the town, not expressly delegated to any other person. He shall have general supervision and oversight over the departments, and offices of the town government and shall be the chief representative of the town and shall report to the board any failure on the part of any of the officers of his or any other department to perform their duties, and shall preside at all meetings of the board of commissioners, except that the mayor pro tem shall preside in his absence. He shall sign all contracts on behalf of the town, unless otherwise provided by law or ordinance or resolution of the board of commissioners; he shall have charge of, and cause to be prepared and published, all statements and reports required by law or ordinance or by resolution of the board of commissioners.