Miller assisted coaching at the
University of Hawaii at Hilo in 2003. Miller was assistant coach at
Rutgers University–Camden in 2009. From 2010 to 2011, Miller assisted on the
Villanova Wildcats baseball team. On July 8, 2011, Miller joined the
William & Mary Tribe baseball program as an assistant coach. On July 15, 2013, Miller was announced as the head coach of
William Penn Charter School. On June 29, 2017, Miller was the head coach of the
La Salle Explorers baseball program. Miller lead the Explorers to a 14–41 record in his first season. Following a shortened
2020 NCAA Division I baseball season due to the
COVID-19 pandemic, La Salle announced that baseball would be one of the seven sports to be dropped at the end of the 2020–21 academic year for sustainability reasons. When the Explorers took the field for their final season in 2021, they set a school record with 32 wins and tied a school record with 15
Atlantic 10 Conference victories. As a result, Miller was named the Atlantic 10 Coach of the Year. In January 2022, Miller was named the head baseball coach at
Penn State Abington. Miller lead the Nittany Lions to a second-place finish in the
United East Conference. For his efforts, he was named the United East Coach of the Year. On September 8, 2022, Miller was named the head coach of the
Manhattan Jaspers. ==Head coaching record==