She was enrolled at the Community College of Rhode Island[2] before deciding to study sales and marketing at DeVry University.

[4][6] They trained in Boston, coached by Bobby Martin, Carrie Wall (technical), Mark Mitchell (in-betweens, polishing), and Peter Johansson (throws).

In the 2009–2010 season, Castelli was off the ice for a month after she collided with an Italian while she was skating backwards and landed on his blade, resulting in 15 stitches to her inner thigh.

Castelli/Shnapir won their second national title at the 2014 U.S. Championships and were named in the U.S. team to the 2014 Winter Olympics, held in February in Sochi, Russia.

[10][11] On June 10, 2014, Castelli announced that she and Canada's Mervin Tran had formed a partnership which would train mainly in Montreal under Bruno Marcotte and to a lesser extent at the Skating Club of Boston under Bobby Martin.

[14] After winning bronze at the 2016 CS Autumn Classic International, the pair appeared at two Grand Prix events, placing 7th at the 2016 Skate America and 5th at the 2016 Trophée de France.