Dr. Roettger completed his undergraduate work in 2002 at the University of Regina, receiving bachelor degrees in both mathematics and computer science. He remained in Regina for his master’s work, doing research on Lucas functions under the supervision of Dr. Richard McIntosh. He then went on to complete his doctorate at the University of Calgary under the supervision of Dr. Hugh Williams and Dr. Siguna Muller.

Dr. Roettger joined MRU in 2009, and in 2025 he was promoted to full professor. Currently, he is cross-appointed between the Department of General Education and the School of Computing Sciences and Mathematics.

He works in the areas of elementary number theory, computational number theory, and cryptography; in particular, Dr. Roettger enjoys a good integer sequence.