Juliet competed for Jamaica in the 1992 Summer Olympics held in Barcelona, Spain in the 100 Meters and 200 Meters where she won the silver medal. The same year she was deservedly elected Jamaican sportswoman of the year.
Four years later at the Atlanta 1996 Games, she helped the Jamaican 4 x 100m relay team of Michelle Freeman, Nikole Mitchell and Merlene Ottey to the bronze medal. With the Jamaican sprint relay team, she also won a gold medal (1991) at the Tokyo World Championship and another two silver medals in 1995 and 1997 at World Championships.

Juliet, retired in 1999, based upon an Achilles injury. She first returned home to Jamaica to take up a position at Western Sports as a marketing manager promoting their PUMA brand. It was then that she was discovered by Ed Barnes who brought her into television to do analysis at track and field meetings. She was later recruited by then program manager at KLAS FM, Ed Wallace, to work at a VMBS Boys' and Girls' Championships. Chairman Alston Stewart then asked her to be a regular presenter for the daily sports talk program Scoreboard.

She is now the owner of Cuthbert's Fitness Studio in Kingston, Jamaica.