Laboratory technician at Quba Water Factory, Madinah, Saudi Arabia – Laboratory chemist in measuring water quality for microbiological and chemical characteristics at National Water Company, Riyadh, Saudi Arabia – Health inspector at Madinah Regional Municipality, Madinah, Saudi Arabia – Lecturer at Department of Biology, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia – Assistant Professor at Department of Biology, Faculty of Science, University of Tabuk - Chairman of Questionnaires and Indicators Committee at Department of Biology, University of Tabuk - Vice Chairman of Facilities and Equipment Committee at Department of Biology, University of Tabuk - Laboratory Quality Supervisor at Department of Biology, University of Tabuk - Commissioner of Learning Communities at Department of Biology, University of Tabuk - Principles of Environmental Conservation course coordinator at Department of Biology, University of Tabuk - Member of Facilities and Equipment Committee at Faculty of Science, University of Tabuk