During his time at Berklee he did a recording with legendary professor and musician Herb Pomeroy and forged relationships with lifelong musical friends including Dick Berk.
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He founded the Jazz Adoption Agency in the early 1980s, playing into the 2000s; among this group's alumni are Andy Martin, Mike Fahn, Nick Brignola, John Nagorney, Keith Saunders, Tad Weed, and John Patitucci.
In addition, Riposo has been a conductor for many jazz ensembles with notable guest artists such as Dizzy Gillespie, Phil Woods, Marvin Stamm, Glenn Drewes, Darius Brubeck, Nick Brignola, and Bob Kindred.