He certainly seems to have a positive impact on this year's pitching staff.

And his bio is impressive. From HokieSports:

Prior to his two-year stint with Kennesaw State, Gillis spent eight years on the staff at Missouri. He spent the 2015 and 2016 seasons as head pitching coach after serving the previous six campaigns as director of pitching for the Tigers.

In addition to his role at Missouri, Gillis founded the Gillis USA Softball Training Academy in 1986 where he mentored seven USA Team members, three USA Team Olympic Gold Medalists, 20 collegiate All-Americans and eight players who pitched in the Women’s College World Series.