Section 98. Duties of city engineer

It  shall  be  the duty of the city
  engineer to perform all the ordinary engineering and surveying  services
  in  the  affairs  and  business  of the city and to supervise, under the
  general direction of the commissioner of public works, all the work done
  for the city in which the skill of his profession  may  be  required  or
  useful.  He  shall,  under  the  direction of the commissioner of public
  works  and  the  ordinances  of  the  common   council,   act   as   the
  superintendent of public buildings, bridges, docks and wharves. He shall
  perform  such  other  duties as may be prescribed by the commissioner of
  public works or by ordinance of the common council. He shall devote  his
  time exclusively to the service of the city.