Team that traveled to Guadalajara, Spain for a friendly series. She then played the 2007 Women's Pan-American Volleyball Cup in Colima, Mexico. Her team qualified for the 2008 FIVB World Grand Prix with a 3–2 victory in quarterfinals over Puerto Rico, and finally winning the competition's bronze medal with a 3–1 victory over the United States. Castillo then played in the 2007 Pan American Games held in Rio de Janeiro, Brazil. Her national team lost in the quarterfinals after falling to Peru and ending up in fifth place. Castillo played in August her first Worldwide competition by playing the annual FIVB World Grand Prix in Tokyo, Japan then Hong Kong, China and finally Taipei, where her team won their first competition's match ranking in eleventh place overall. After that competition, she moved in September with her national Senior Team to Winnipeg, Canada, playing the NORCECA Championship. There she won the bronze medal. She then took part in the world cup in the FIVB World Cup when the Dominican Republic was assigned with a wild card. Her country ranked ninth after winning only three matches during the competition. In the second half of December, Castillo played in Monterrey, Mexico the NORCECA Olympic Qualification Tournament; but her team fell 0–3 to Canada in the semifinals getting out of contention for the Olympic berth and later 2–3 to Puerto Rico in the Bronze medal match. 2008 She played for the Senior National Team at the 2008 Olympic Qualification Tournament in Japan. There her team ended up in fourth place, and did not qualify for the 2008 Summer Olympics. She then played in July with her National Junior Team, winning the silver medal at the 2008 NORCECA Junior Continental Championship U-20, and was elected Most Valuable Player, Best Libero, Best Digger and Best Receiver. Shortly afterwards Castillo claimed with her Senior Team the gold medal at the 2008 Women's Pan-American Volleyball Cup in Mexico as a sixteen-year-old. Later that year her team won the silver medal at the Final Four Cup, as she won the Rising Star award. 2009 During the Holy Week Sport Festival held in Hato Mayor, Castillo played Beach Volleyball (three) with Yenifer Calcaño and Evelyn Carrera winning the Gold Medal of the event. She won with her Senior team the silver medal and the "Rising Star" award at the 2009 Pan-American Cup. In June 2009, at the 2010 World Championship