Fresh from the University of Wisconsin, Fred Tinsley joined the department with a specialty in geometric topology. Tinsley maintained the momentum of his graduate research and did not let the small college atmosphere bring professional isolation. Instead, he continued a research program that drew the attention of topologists across the country. A few years into his career, he connected with R. J. Daverman at the University of Tennessee, and together they wrote several important papers. He helped found and organize an annual summer topology workshop that the drew active researches from around the country. Later in connected with Craig Guillbault from the University Wisconsin and together they wrote several key papers in the field.

Tinsley also earned an M.S. in Statistics while at the University of Wisconsin. In 1986, his interest blossomed into a sophomore level course introducing students to linear models. After developing the course for a few years, he alternated with Steven Janke in teaching the course every other year. In the 1990's, together they turned notes for the course into a book-length manuscript: Introduction to Linear Models and Statistical Inference.

Tinsley was active for a time in faculty governance and was consulted particularly for budgetary issues at the college. He twice chaired the key faculty committee (now the Faculty Executive Committee), and from the fall of 1991 until the spring of 1994, he was chair of the mathematics department. He retired in 2017.

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