As used in this chapter, "certificated employee" means:

(1) A person who holds a professional education certificate issued by the superintendent of public instruction and who is employed by a school district or charter school in a position for which such certificate is required by statute, rule of the professional educator standards board, or written policy or practice of the employing school district; or

(2) A superintendent or a person hired to fill a position designated as, or which is, in fact, deputy superintendent or assistant superintendent; or

(3) A charter school's lead administrator or a person hired to fill a position as the lead administrator's deputy administrator or assistant administrator.