Mr. Helms replaces David Danhoff, who left to take the superintendent's position at Vanguard Sentinel Career Center in Fremont.
Mr. Helms was given a three-year contract, effective Sept. 1, and will be paid $82,500 annually.
The board chose Mr. Helms over assistant superintendent Dennis Gable. The board said it only conducted an internal search for its new superintendent.
Mr. Todd has served as high school principal for four years and has 16 years of experience in education.