أ.د كركز محمد ثلج

                Researcher in Food Analysis in Trade Ministry and Agriculture Ministry, from 1988 to 1993.

2. Researcher and Lecturer at the IPA Research Centre and Veterinary Medicine College, Mosel University, from 1994 to 2003.
3. Head of the Departments of Food Science and Biotechnology in the College of Agric. Univ. of Tikrit. From 29 March 2004 to 20 Feb. 2010.
4. Lecturer in Food Science and Biotechnology in College of Agric. Univ. of Tikrit. From 20 Feb. to 13 Oct. 2010.
5. Scientific Assistant of Dean in College of Agric. Univ. of Tikrit. From 13 Oct. 2010 to 28 Dec. 2011.
6. Dean of Agriculture College, Tikrit University. From 29 December 2011 to 4 July 2013.
7. Dean of College of Pharmacology, Tikrit University. From 4 May 2013 to 4 July. 2013.
8. Lecturer in the Food Sciences Department from 5 July 2013 till now.