Meet The Trainers


Chrissy Atiles is a Long Island native who moved to Texas in the summer of 2020. She served in the United States Air Force from 2010-2015 as a law enforcement officer and participated in several Military Working Dog training seminars. Since her military career she explored many career path changes before she finally found her true calling as a dog trainer. Chrissy absolutely loves being the reason why owners are so proud of their pup’s transformation.


Ashley Wilber is from upstate New York but she relocated to Texas in 2016. She has had dogs all her life and has been working with dogs professionally since 2016. She left her job working at a major pet store chain and joined Bulletproof in 2019. Ashley is a huge dog lover with a passion to help dogs be the best version of themselves possible. Her favorite part of training dogs is witnessing the way a transformed dog can make an impact on the lives of the pup and their family.


Elle Stradling moved to Texas in 2021 and has been training dogs since 2019. She is a Canine Good Citizen Evaluator, has temperament-tested puppies in training programs, and trained with United Schutzhund Clubs of America. Her favorite thing about continuing dog training is learning new skills and how to train each dog’s personality. She will often research random training techniques in her spare time for fun.


Gage Toussaint was born in Corpus Christi, Texas. He has been around dogs his entire life & developed a love for them at a young age. Right out of high school he joined the Air Force, where he spent 4.5 years as a Security Forces Member. Gage got out of the Air Force to pursue his passion for dogs. He finds a sense of pride transforming dogs into obedient companions for their families.


Colton Osterman is a west coast native that served four honorable years in the United States Navy from 2010 to 2014. After the military, Colton received his Bachelor’s degree in Criminal Justice. Colton moved to Texas in 2019 to explore career opportunities. Colton joined Bulletproof Dog Training in August 2020, and has been training top quality dogs day in and day out ever since.


David Hoff served 15 years in the Army. Where he was a Respiratory therapist. He provided care to his patients as well as their family members. He enjoyed improving the quality of life for his patient before he was medically retired. He transitioned into a dog trainer so he could continue serving others. By improving the quality of life of man’s best friend and their owners. When owners are able to do everything they wish they could with their dogs it puts a smile on everyone’s face.


Rabea Ervin-Casillas was born and raised in Germany and has been a military spouse for over 17 years. She moved to San Antonio in 2020 to be able to train dogs full time. She has been working with dogs for over 10 years and has been certified since 2014 through Animal Behavior College. Her certifications include:

-ABC Certified Dog Trainer
-ABC Pet Massage Certification
-ABC Training Shelter Dogs Certification
-ABC Pet Nutrition and Diet Certification
-AKC Canine Good Citizen Evaluator
-Alliance of Therapy Dog Observer
-CBCC-KA Ethology Body Language and Observation Skills Certification
-Police K-9 Handler Course Certification
-Pet CPR Instructor



Chip Frederick was born and raised in Oakland, Maryland where he was active in sports including football, basketball and baseball. He joined the US Army National Guard his senior year of high school at the age of 17. Upon returning home after Basic Training and AIT at Ft. Leonard Wood, Missouri he began working at the local marina. He also played a year of semi professional baseball and raced ATV’s in the Grand National Cross Country series. During his career serving our country he was deployed to Egypt for Operation Bright Star and the Panama Canal for training. After the attacks on 9/11 he was activated for Homeland Security in support of Operation Enduring Freedom where he led a team of soldiers for a Quick Reaction Force at the US Army War College, Carlisle Barracks, Pennsylvania for a year long deployment. In March 2003 he was once again activated in support of Operation Iraqi Freedom where he served 3 consecutive tours in Iraq. After serving his country for 20 years he worked for the largest producing logger in the state of Maryland as a maintenance technician. July 2021, Chip and his wife Lisa sold their home in Maryland and moved to the San Antonio area to semi-retire and for him to pursue his childhood dream of working with and training dogs. He has always had a passion for training dogs. In his spare time he loves spending time with his wife Lisa and their dog Melo, hunting, and dirt track racing.