Head, Department of Mathematics, College of Science, Purdue University (past)
Director, Actuarial Science Program, Purdue University (past)
Associate Professor, Department of Mathematics, College of Science, Purdue University (past)
Assistant Professor, Department of Mathematics, College of Science, Purdue University (past)
Professor Emeritus, Department of Mathematics, College of Science, Purdue University (past)
Professor, Department of Mathematics, College of Science, Purdue University (past)
Professor Emeritus, Department of Mathematical Sciences, School of Science, Indiana University-Purdue University Indianapolis
Professor, Department of Mathematical Sciences, School of Science, Indiana University-Purdue University Indianapolis
Professor Emeritus, Department of Mathematical Sciences, School of Science, Indiana University-Purdue University Indianapolis