Maneri attended Saddle Brook High/Middle School in Saddle Brook, New Jersey, graduating in 2006. He played varsity basketball for three years, earning all-county honors as well as being named to the Bergen-Passaic Scholastic League Carpenter Division first-team in his junior and senior seasons. Maneri played one season of football as a tight end, making 36 catches for 607 yards and five touchdowns as a senior, earning Bergen Record second-team All-North Jersey honors. He was coached in football at Saddle Brook by NationalUnderclassmen.com and National Underclassmen Combine founder David Schuman.
Following high school, Maneri attended Temple University, playing in ten games at tight end as a true freshman in 2006. He had six catches on the season for 61 yards and two touchdowns. He played in 13 games in 2007, starting three. In 2008, as a junior, Maneri started 9 of 12 games, recording 14 receptions for 150 yards and four touchdowns. In his senior season in 2009, Maneri started all 13 games at tight end, finishing the season with 12 receptions for 134 yards and two touchdowns, earning third-team All-Mid-American Conference honors.