The term of office of such superintendent shall be for a period of two years, and until his successor is appointed and qualified, and the board of county commissioners shall have power to remove such officer for any cause they shall deem sufficient. Within thirty days from the date of appointment each superintendent shall qualify by taking and filing with the county clerk an oath to faithfully perform his duties as such superintendent, and shall furnish a bond to the county to faithfully perform his duties and to account for all moneys collected by him, which bond shall be in the sum of two thousand dollars [($2,000)], with at least two good and sufficient sureties, to be approved by the board of county commissioners, and filed with the county clerk.