Dr. El-Sayed El-Hady studied Mathematics at the University of Suez Canal (Ismailia, Egypt) where he obtained his B.Sc. (2004) and M.Sc. (2010). In February, 2016 he got his PhD from Innsbruck University (Innsbruck, Austria) with two advisors one from Austria (W. Forg-Rob) and the other from Poland (J. Brzdek). His research interests are the investigations of solutions of "some" functional equations with applications and studying the stability of many kinds of (functional/fractional/differential/integral) equations. He is currently an associate professor of Math. at Suez Canal University (Egypt) and Jouf University (KSA).