This section applies to all counties, except Baltimore City. The governing body of a county has control over county roads. The governing body of a county may appoint: road supervisors; and civil engineers to oversee the grading, construction, and repair of county roads. A civil engineer appointed in accordance with subsection (c) of this section shall: hold office for a term, with a salary, under a bond, and subject to regulations of the governing body calculated to secure competent officers and a faithful discharge of duty; and direct and manage the grading, construction, and repair of county roads.