A graduate of Ohio University, Roush earned graduate degrees, and began his career, at Miami University, where he became executive assistant to the president in 1976. Four commas in this sentence feels a bit excessive. I think you could take out the second and third commas and the meaning would still be clear.
He earned a Master of Education degree and a Ph.D. in educational administration, both from Miami University, in 1973 and 1979, respectively No need for a comma before "respectively".
As of 2024, the school still employs the CentreTerm 4-1-4 system. You've used the "CURRENTYEAR" variable in the "as of" tag. Going by Wikipedia:As of#Precise language, these shouldn't be mixed.
A further curriculum revision came in 2019, when the general education requirements were replaced with a new system which featured the "Doctrina Lux Mentis" sequence, named for the school's motto. What does "sequence" mean in this context? We could do with a translation of the Latin phrase, as well.
Martha Raddatz, who moderated the 2012 debate for ABC, returned to speak at the school's 2013 commencement ceremonies. I think it's fine to mention the debates, as they were major events during Roush's tenure, but this line is getting a bit off topic. It's might be better placed in a general history of the college.
...John C. Young who led the college for 27 years in the nineteenth century, and Thomas A. Spragens, who resigned in 1981. It seems like the length of term for Spragens should be stated, rather than when he left office, as this is a comparison of the longest tenures.