These community clinics service veterans and civilians with physical, cognitive, and/or sensory impairments. She has added valuable influence and input into multiple organization throughout the country. Castillo, alongside Lajean Gould, Founder of the Women in Golf Foundation, has hosted the National Women's Collegiate Golf Championship, which is an annual three-day, spring competitive golf event started in 1994. The event celebrates 25 years this year. In 1997, Castillo joined the teaching ranks of the LPGA as a Certified Golf Teaching Professional. She is the third African American golfing professional to achieve Class A Status as a LPGA Teaching and Club Professional (T&CP), studying many hours and attending numerous seminars and workshops, culminating with testing and placing at the top of her group for the playing ability test, in 2003. Castillo was named one of the top 50 LPGA Teachers by LPGA Women's Golf Magazine in 2017. She has taught LPGA Golf for Women's Clinics, Tiger Woods Golf Clinics, Hook a Kid on Golf Clinics, LPGA/US Girls Golf Clinic, Inc. and Odyssey Travel Golf Clinics. She taught Zakiya Randall who became the only Atlantean to win a medal and first place in the U.S. Women's Open local in Atlanta. And who was introduced to the sport through First Tee of Atlanta where Castillo was an instructor. Castillo serves as a National Evaluator for the LPGA. She has taught alongside Tiger Woods at his Tiger Woods Golf Clinics at Brownsmill Golf Course. Oneda worked alongside Charlie Sifford son of the African American professional golfer Charlie Sifford who helped desegregate the PGA Tour and also taught alongside Renee Powell, the second African American female golfer to play on the LPGA Tour. Castillo's decision to join the LPGA was influenced by the fact that the 13 original founders of the organization made the decision to exclude the "Caucasian Only" clause that existed in the original PGA charter. Castillo has met many of the founders including Patty Berg, Louise Suggs, Betty Jameson, Shirley Spork, Bettye Danoff and Marilynn Smith. In 2014, she was appointed as a Global Instructor to the newly formed LPGA Global Education Program and is the only African American on that team. Each year, Castillo with the Women In Golf Foundation hosts the Spring National Women's Collegiate Golf Championship.