I am a lecturer in the Department of Mathematics, Faculty of Mathematics and Natural Sciences since 1999. In 2018, I completed a doctoral program at the Mathematics Department of FST, University Kebangsaan Malaysia in Malaysia. I teach several subjects such as Calculus, Abstract Algebra, Real of Analysis, Introduction to Control System and Calculus of Variation. The main subject of my research is real of analysis, especially a fixed point theory. However, I am also interested in developing research in other fields such as linear programming, variation calculus and control system.