Dr. Castellano completed his undergraduate training in 1986, at St. Marys University in San Antonio, Texas. He graduated Magna Cum Laude with a bachelors degree in biology. Upon graduation, he attended the University of Texas Dental Branch in Houston and received his DDS degree in 1990. Dr. Castellano then completed a one-year residency in advanced general dentistry and later a two-year residency to specialize in the field of pediatric dentistry. Both were completed at the University of Texas Health Science Center in San Antonio, Texas (UTHSC-SA). Dr. Castellano is board certified in pediatric dentistry.
Dr. Castellano is a member of numerous professional organizations. Some of these include the American Dental Association, Texas Dental Association, Laredo District Dental Society, and the American Academy of Pediatrics. He is a member and a past president of the Texas Academy of Pediatric Dentistry.
Dr. Castellano is deeply involved with the American Academy of Pediatric Dentistry (AAPD)- the membership organization representing the specialty of pediatric dentistry. The AAPDs 10,00+ members serve as primary care and specialty providers for millions of children. With the AAPD, he has served on the Council on Continuing Education, Ex-Officio on the Council on Governmental Affairs, and has served on and chaired the Council on Clinical Affairs, and its Committees on the Adolescent, Perinatal Oral Health, and Behavior Guidance. He has also served on the Task Force on Strengthening the Science in AAPDs Guidelines and Journals, the task force on General Dentists, and on the Advisory Board for the AAPD Pediatric Oral Health Research and Policy Center. He is a graduate of the AAPDs Leadership Institute and the AAPDs Advanced Leadership Institute. He has served on the Board of Trustees of the American Academy of Pediatric Dentistry (AAPD) as well as on its Executive Committee where he proudly served as President of the organization.
Dr. Castellano is an Assistant Clinical Professor for the Department of Developmental Dentistry at UTHSC-San Antonio Dental School. Monthly, he teaches and assists dental students and pediatric dental residents with their training. He has authored and co-authored several publications in the dental literature, as well. In November of 2004, and each year since Dr. Castellano has been chosen as a Texas Super Dentist by the Texas Monthly Magazine.
Dr. Castellano has been a Laredoan since 1976. His commitment to oral health care in the Laredo area began in 1992. He has a wife, Vanessa, who is also a dentist and two children, Nicolas, and EJ. He loves the outdoors and enjoys hunting, biking, and being outdoors.