As used in sections 23-2501 to 23-2516, unless the context otherwise requires:
(1) Employees shall mean all county employees of the county. The term employees shall not include part-time employees, employees subject to the state personnel service, court-appointed employees, employees of the county attorney's office, employees of the public defender's office, dentists, physicians, practicing attorneys, deputy sheriffs, officers appointed by the Governor, or elected officers or the chief deputy of each office or the deputy of each office if there is not more than one deputy in the office;
(2) Part-time employee shall mean any person whose position is seasonal or temporary as defined by the commission;
(3) Department head shall mean an officer holding an elected office, an officer holding office by appointment of the Governor, the chief deputy of any office or the deputy if there is not more than one deputy, and such other persons holding positions as are declared to be department heads by the county board; and
(4) Commission shall mean the Civil Service Commission.