Steve Gruenberg was named the Assistant Baseball Coach at Case Western Reserve University in October 2020. 

In his five seasons with the team, the Spartans have gone 133-65-1, receiving a berth to the NCAA Tournament in 2023, 2024, and 2025 and claiming the University Athletic Association Championship in 2022, 2024, and 2025. His work with the pitching staff helped lead sophomore Tyler Horvath to D3baseball.com All-America Second Team honors in 2022, while Horvath shared UAA Pitcher of the Year honors with graduate student Evan Faxon.

Gruenberg helped the 2024 staff finish the year ranked third among all Division III teams with 10.5 strikeouts per nine innings, while the team's 413 total strikeouts during the year surpassed the previous program record by 54. 

Gruenberg brought with him extensive experience as an NCAA Division III coach, in particular, the development of collegiate pitchers. He came off an eight-year stint as the Associate Head Baseball Coach at Kenyon College, where he worked primarily with the pitchers and catchers, while also assisting with recruiting and other facets of team management. While at Kenyon, he guided 20 players to All-North Coast Athletic Conference honors and helped the 2018 squad earn a spot in the NCAC Baseball Tournament.

Gruenberg has also been the Assistant Coach and Pitching Coach for the Harwich Mariners of the prestigious Cape Cod Summer Baseball League since 2013, where he worked to develop some of the top collegiate pitching talents in the country that appeared in the prestigious league. Thirty-four of his pitchers in the league were drafted over the last four years, and his 2016 squad set a league record with a 2.00 team ERA. In addition, he served as the Mariners Youth Clinic Coordinator.

In addition to his duties with the baseball team at Kenyon, Gruenberg was an assistant coach with the football team from 2012-17, coaching wide receivers and linebackers and serving as the Director of Football Operations.

Before his time at Kenyon, Gruenberg worked as an assistant coach at John Carroll University for one season, helping the team reach the 2012 Ohio Athletic Conference Championship Tournament.

Gruenberg began his collegiate career pitching for Marietta College, where he pitched for two seasons, including the squad’s 2006 National Championship campaign. He went on to earn his Bachelor of Science in Human Development and Family Science from The Ohio State University, and his Master of Educational, School and Counseling Psychology from the University of Missouri. He is also certified as a Strength and Conditioning Coach by the International Sports Sciences Association.