Jon Delise's professional experience includes full time service at Fordham University, nine years as a math chair in Merrick, NY and over twenty years in the New York City school system as a principal and a high school math department chair. Jon has led professional development sessions on a variety of topics, including a series of workshops exploring how to incorporate technology into classroom instruction. In addition, he served as a member of the City College of New York committee that reviewed the city's K-12 math curricula, and was a member of the New York City mathematics advisory committee. Jon has taught all levels of middle school and high school mathematics to students of varying mathematical abilities.

Jon has a Master of Science degree in Mathematics from Yeshiva University, and a degree in School Administration and Supervision from Queens College. In his spare time, Jon likes to do the crossword puzzle in the New York Times.