Born and raised in Lebanon, CT, Jason graduated from Lyman Memorial High School in 2018 where he played second base and was a member of the 2017 state runner-up team. He then attended Three Rivers Community College before transferring to Eastern Connecticut State University, graduating in 2023. Jason began his coaching career in 2019 as the assistant coach under Steve Starr at Lebanon Middle School. Since 2020 he has been an assistant under legendary coach Marty Gomez at Lyman Memorial High School. At Lyman, Jason has helped the Bulldogs to a 78-59 record since 2020 and a state tournament semifinal appearance in 2023. He also coached as an assistant for Tri-County American Legion 15U and 17U from 2020-2023, both programs winning their zone in 2021. In his time with Tri County, 15u had a record of 54-31 and 17u had a record of 67-28. Jason began playing in the GHTBL in 2021 under manager Tyler Repoli. On the Graphics, Valliere is one of 18 members on the roster who previously played for Tri-County legion. He took over as manager of the Graphics in 2023 and that year led them to a 1st place regular season finish for the first time in over a decade. In three years at the helm, Valliere has led the Graphics to a 46-34 record. Jason currently works in the athletic department at the United States Coast Guard Academy in New London, CT and resides in Lebanon.