After the war, he went to Paterson State College and graduated from Montclair State Teachers College with a Bachelor of Arts degree in 1947 and Master of Arts degree in 1949. Over the next thirteen years, Helstoski served as a teacher, high school principal and finally superintendent of all Bergen County schools.
Following the war, Helstoski attended Paterson State College and earned his Bachelor's and Master's degrees from Montclair State Teachers College in 1947 and 1949. He then worked as an educator for thirteen years, rising to become a high school principal and eventually superintendent of all Bergen County schools.