Henry J. Kelley earned his Bachelor of Science degree from New York University in 1948 before entering the Grumman Aircraft facility on Long Island.
The document titled Gradient Theory of Optimal Flight Paths appeared in Ars Journal during October 1960 and became a major contribution to aeronautical engineering.
Jürgen Schmidhuber confirmed this connection in a 2015 Scholarpedia article on Deep Learning while Stuart Dreyfus also noted the derivation.
He received the AIAA Guidance and Control of Flight Award in 1973 followed by the AIAA Pendray Award in 1979.