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 conflict, he attended Paterson State College and earned a Bachelor of Arts degree from Montclair State Teachers College in 1947 and a Master of Arts degree in 1949. Over the subsequent thirteen years, Helstoski worked as an educator, high school administrator, and ultimately superintendent of all Bergen County schools.