Associate Professor, Dept. of Mathematics and
Statistics, Sam Houston State University, Huntsville, Texas,
2004 to date.
Assistant Professor, Dept. of Mathematics, Computer Science and
Statistics, Sam Houston State University, Huntsville, Texas,
August,1998 to 2004.
Visiting Assistant Professor, Dept. of Statistics
, University of Central Florida, Orlando, Florida,
August, 97 -August,98.
Graduate Teaching Assistant, Dept. Mathematics and Statistics, Univ. of
Nebraska, Lincoln.
Head of Food Crops Statistics, Central Bureau of Statistics of Indonesia,
Lecturer, Mathematical Statistics and Official Statistics,
Academy of Statistics, Government of Indonesia.
Staff of Agricultural Statistics, Central Bureau of Statistics,
Government of Indonesia.