In 2000, she won the Miss Puerto Rico Universe 2001 title while representing Lares. This qualified her for the chance to compete at the Miss Universe 2001 pageant.
In 2001, she won the Miss Universe 2001 title. She also won several awards such as Miss Photogenic, Bluepoint Best in Swimsuit, and Clairol Herbal Essences Style Award.
In February 2014, Quiñones joined the eighth season of Univision's beauty pageant reality show Nuestra Belleza Latina 2014 as a team mentor where she coaches a team of young women on modeling industry success techniques.
On February 15, 2018, Quiñones was named as the new pageant director for Miss Universe Puerto Rico, taking over responsibilities previously held by former director Desiree Lowry.