The commissioner shall select and employ a business manager assistant and one or more chief engineer assistants who shall be registered professional engineers, and shall establish such other offices, activities, divisions, sections and organizational units as may be necessary and practical. The business manager assistant shall be in charge of and responsible for matters of finance and such other functions as may be assigned to him from time to time by the commissioner. The chief engineer assistant or, if the commissioner has selected and employed more than one chief engineer assistant, the chief engineer assistants shall be in charge of and responsible for planning, equipment, materials, construction, maintenance, and such other functions as may be designated by the commissioner as well as such other functions as may from time to time be assigned to such chief engineer assistant or assistants by the commissioner.
The commissioner shall require every employee who collects fees or handles funds or who has custody or control of equipment or supplies belonging to the state to give bond, with such sureties and in such penal sum as may be approved by the commissioner, for the faithful discharge of each such employee's duties and his accounting for all such fees, funds, equipment and supplies coming into his hands or under his custody or control. All such bonds, when approved by the commissioner, shall be filed in the office of the secretary of state. Premiums on all such bonds shall be paid from commission funds.