The county welfare board shall appoint a superintendent of welfare who shall be the director of welfare under the direction and supervision of that board. The superintendent shall:
a. Have the qualifications and be subject to the same examination as an overseer;
b. Be a citizen of this state and of the United States;
c. Be able to read and write the English language;
d. Be capable of making and keeping such records and reports as are lawfully required of him;
e. Have complete knowledge of the laws concerning the relief and maintenance of the poor; and
f. Not be a member of the board.
The county adjuster when qualified may be appointed for this office, but when so appointed shall not serve as an ex-officio member of the county welfare board.