Professor Jan 2013- Department of Mathematics (Basic Sciences), College of Sciences, The University of Sharjah, UAE
Associate Professor Oct 2001- Jan 2013 -Department of Mathematics (Basic Sciences), College of Sciences, The University of Sharjah, UAE
Assistant Professor 1988-2001 - The Department of Mathematics, College of Sciences, Qatar University, 1999-2001. - The Department of Mathematics, School of Computing and Mathematical Sciences, The University of Waikato, Hamilton, New Zealand, 1998 and 1999. - The Department of Mathematics, College of Sciences, Sana'a University, Sana'a, 1993-1997. - The Department of Mathematics, College of Sciences, King Saud University, Riyadh, Saudi Arabia, 1988-1993.
(a) Ali Jaballah, The number of overrings of an integrally closed domain, Expo. Math. 23 (4) (2005) 353-360, Elsevier.
(b) Ali Jaballah and Fathi B. Saidi, Uniqueness results in the representation of families of sets by fuzzy sets, Fuzzy sets and systems, 157(2006), no 7, 964-975, Elsevier.
(c) Ali Jaballah, Maximal Non-Prüfer and Maximal Non-Integrally Closed Subrings of a Field, Journal of Algebra and its Applications Vol. 11, No. 5 (2012) 1250041 (18 pages), World Scientific.