Haddad was also the co-developer of the IBM 604, the world's first mass-produced programmable electronic calculator, along with Ralph Palmer.

[7][8][9][10][11] He received a Bachelor of Science in electrical engineering, Cornell University, 1945.

Haddad lived in Briarcliff Manor, New York, with his wife and five children.

[12] Haddad was the co-developer of the IBM 604, the world's first mass-produced programmable electronic calculator, and jointly directed the IBM 701 electronic defense calculator program with Nathaniel Rochester.

[13] Haddad was the vice president of technical personnel development when he retired from IBM in 1981.