1932
Dr. Zimmermann is born in Minneapolis, Minnesota to Lawrence and Bertha Mabel Zimmerman.
1954
Dr. Zimmermann receives a Bachelor of Arts from the University of Minnesota.
1965
Dr. Zimmermann receives a Master of Arts from the University of Minnesota.
1968
Dr. Zimmermann becomes an assistant professor of psychology at the University of Winnipeg in Manitoba, Canada.
1969
Dr. Zimmermann becomes a research associate in the psychiatry research unit of the University of Minnesota.
1970
Dr. Zimmermann receives a Doctor of Philosophy from the University of Minnesota.
1974
Dr. Zimmermann becomes an external review officer for the Food and Drug Administration in Washington, D.C.
1975
Dr. Zimmermann becomes a senior scientist in the biometric laboratory at George Washington University.
1976
Dr. Zimmermann serves as a private consultant for research design and data analysis in Minneapolis, Minnesota.
1976
Dr. Zimmermann becomes an adjunct clinical assistant professor in the psychiatry department of the University of Minnesota.
1984
Dr. Zimmermann becomes a senior research manager at Maritz Market Research.
2014
Dr. Zimmermann self-publishes “The Puzzle” under the pseudonym, R. Leaurenz.
2015
Dr. Zimmermann self-publishes “Last Rites” and “Prodromal: Incident in Mbandaka” under the pseudonym, R. Leaurenz.
2016
Dr. Zimmermann self-publishes “Kendra” under the pseudonym, R. Leaurenz.
2017
Dr. Zimmermann self-publishes “Now or Never” under the pseudonym, R. Leaurenz.