About Our Trainers

Meet The DFW Off Leash K9 Team

Justin - Regional Director

Justin is the Regional Director for the DFW area. He manages the day to day operations, and prides himself in communication with trainers and client’s. He has had a relationship with dogs since he was a young boy. Growing up he and his father spent most of their time training and working with hunting dogs. He has always had a passion for retrieval and field work.

At the age of 18, Justin enlisted into the United States Marine Corps and was stationed in Okinawa, Japan. He deployed to Afghanistan for a total of 9 months in support of Operation Enduring Freedom. In 2013 he attended American K9 Special Service for the basic and advanced obedience instructors course.

After leaving the Military in 2014, he worked as a contractor in the private security industry. In 2016, Justin made his way back into obedience dog training. Since then he has trained hundreds of dogs, specializing in behavioral modification and aggression rehabilitation.

He is a proud member of the International Association of Canine Professionals. He also holds certs as an AKC evaluator, and therapy dog certification. Justin resides in DFW with his wife, son, and 6 working dogs.


Mallory has had a passion for working with animals from a young age. Growing up in Flower Mound she knows the DFW area very well.

It all started when Mallory rescued a lab mix named Ford. She helped him gain confidence from his abusive past and worked on him with retrieval. Mallory aided her husband, Justin, with his many training dogs, utilizing and incorporating her extensive equestrian knowledge. 

She now has her own Belgian Malinois, Groot, who she has taught agility and sport protection work. After training hundreds of dogs, she still enjoys working with different breeds and learning each time she works with another dog.

Mallory resides in North Texas with her husband, Justin, their son, and 6 working dogs.

Meet Our Amazing Trainers

Brandon - Head Trainer

Brandon served 7 years in the Air Force Security Forces, the last part of it as a Military Working Dog Handler. After his honorable discharge, he completed a 3-month trainer course at AK9I in Virginia where he learned more complex ways of teaching and training dogs. He graduated with his working dog “Monkey”, an 18 months old Malinois certified for patrol and explosives. Brandon’s passion has always been dogs and figuring out what makes them “tick”, which is why we’re happy to have him on board. His easy-going personality and calm demeanor prove him to be an excellent addition to our team.

Ryan - Trainer

Hello, my name is Ryan Zimmerer. I grew up on a farm around working cattle dogs, along as working around working Labradors that retrieved birds for us when we were hunting. After joining the Marine Corps I got out and went to college and got my degree in Farm and Ranch Management. I have been around dogs my whole life training my own personal dogs to work cattle. For the last 4 years I’ve been a part of Adaptive Training Foundation as an athlete learning to workout around my amputation. It is a non profit gym in Carrollton that works with teaching veterans and civilians how to work out and exercise around their injuries and disabilities. I’m now a head trainer there working to help others learn to work out and take control of their lives again. Most recently I have trained my own service dog and found my true passion of working with dogs. Training dogs to do obedience is the foundation for teaching service dogs, and something I take a lot of pride in. I look forward to working with and training your dog, helping him realize his potential of being the best dog around.

Lisa - Trainer

Lisa was born in Dallas and has had a passion for animal behavior since she was a kid. With over 5 years of experience training dogs in obedience, conducting group classes, and private lessons, she absolutely loves to assist owners with their dogs. Lisa has spent 6 years working alongside law enforcement with K9 handler courses, certifying K9 teams, and training detection dogs in a variety of fields (narcotics, explosives, cellphones, bedbugs, patrol and tracking). She currently has a retired 9-year-old Belgian Malinois trained in explosives detection that she raised as a puppy and worked together with on contract searches for college stadiums, cruise ships, and local middle and high schools. Lisa is able to adapt to each dog in what motivates them, how to discourage certain behaviors, and reach the goals the owner wants. Even with working a variety of police K9s and pets, she will tell you the best dog she has ever trained off leash was a little Pug named Roxy whose owners to this day still take her off-leash to Galveston beach.

Brittany - Trainer

Brittany has been in love with animals since she was a young girl. Her passion and dream was to grow up rescuing and training animals of all breeds. As a young adult, Brittany rescued a cat named ‘Panther’ off the streets and leash trained him in obedience. A few years ago Brittany adopted her first Pitbull named Lana, it was at that moment she discovered her true passion for training animals. She began donating her time to non profits, assisting in the care and training of rescue dogs. She began professionally training with Off Leash K9 Training DFW in October of 2019 and has helped several families and dogs since then.

Brittanys favorite aspect about training, is learning and assisting with different personalities and behaviors. Each dog has its own personality, and she loves bringing out the best with each client she works with.

trainer brittany

Laci - Trainer

Laci has had a relationship with animals since she was a young girl. Growing up raising horses, cattle, and dogs has given her quite a bit of experience. Her father, was a very experienced hunting guide, and most of her childhood was spent assisting him in the training and guidance of bird dogs.

As a young woman, she entered the world of Schutzhund where she gained hundreds of hours of experience in the sport of working style dogs. She has two German Shepherds, Kenai and Nova, that are highly trained and experienced in this style of work.

Laci comes with an extensive background in working with clients and animals. Her favorite aspect of training, is problem solving the scenario, and helping the family become better bonded with the animal.

Sam - Trainer

Sam’s relationship with dogs started as a young boy when he got his first dog at the age of 4. He grew up knowing he wanted to do something more. That ultimately led him into joining the United States Marine Corps at the age of 17. He entered the service as a Military Police Officer stationed at Camp Pendelton. One month after being a MP, Sam immediately made the jump to be a k9 handler. His first Military working dog was a Belgian Malinois named Delilah. Together, Sam and Delilah worked as team conducting patrol work and drug detection. After their training together was complete, Sam took control of his next dog. A German Shepherd named OC. Sam and OC worked together completing tactical training missions including suspect apprehension and urban building searches. After completing their training together, Sam was excelling and completely proficient in his handling work and he wanted to further his education and experience.

Sam entered the Specialized Search School at Lackland Air Force Base and after 3.5 months he become certified with a Labrador, Max. They entered the fleet together conducting several pre-deployment training operations.

During his time in service of 4 years Sam successfully worked with a total of 5 military working dogs. He has completed several schools since then, mastering the art of the e-collar and off-leash training. Sam’s passion still ignites a burning flame for working with dogs. He prides himself in his ability to communicate with dogs.

One of his favorite portions of obedience training, is the ability to give the owner and their dog a stronger bond.

He resides in the DFW area with his wife and their 2 dogs Fred and Freida.

trainer sam

Josh - Trainer

Josh served as a Security forces member in the United States Air Force for 7 years. His background in dog training started as a young boy where he helped his grandfather run a professional dog kennel. His experience started with raising, training, and breeding high quality Rottweilers.

By the time he was 18, Josh had successfully aided his grandfather in the sale of 1,300 dogs across the country. At this point something ignited inside of Josh, and at the age of 18 he entered the air force as a security forces member. After 2 years of dedication and working his way to the top, Josh entered the program as a Military Working Dog handler. Josh was a very successful dog handler for a total of 5 years. During this time he completed 1 deployment to Iraq, in support of Operation Iraqi Freedom and 1 deployment to Afghanistan in support of Operation Enduring Freedom. He spent a total of 14 months on the ground between both deployments. Attached to an army infantry battalion he endured several experiences with his K9 such as route clearance and looking for explosives, building searches, foot patrols through dangerous territory, and firefights where Josh and his k9 successfully aided their team in winning the mission. His working dog was a German Shepherd named Larry.

Josh has a extreme amount of experience in handling dogs in dangerous environments. His military experience aided him into his decision to continue aiding people through pet obedience. Since leaving active duty Josh has completed several schools, such as trainers course, e-collar school, and off-leash obedience. He has trained several dogs in the local community. He takes pride in still breeding Rottweilers to a high level of proficiency.

Josh has joined our team to help train obedient dogs and help clients build a better relationship with their pets. His favorite aspect of dog training is giving the clients the ability to enter any environment with a well trained and obedient animal. Josh resides in the DFW area with his wife, 3 kids and 3 dogs.

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About Off Leash K9 Training

Dog Trainers that Are Recognized Around The World!

Nick White, Founder Off Leash K9 Training
Photo: A&E

Nick White is the Owner and Founder of Off Leash K9 Training.  Nick is a former US Marine and former US Secret Service. He currently has over 130+ dog training locations throughout the United States.

Nick is globally recognized as being one of the top dog trainers in the world.  He has 2 official world records in off leash obedience, named on Wikipedia as one of the top 20 dog trainers in the world, recently named top 10 trainer in the world by bestdogtrainers.org, has been featured in many magazines and shows, and he is regularly requested by the top celebrities and athletes! He has been called upon by people such as actor Ryan Reynolds, WWE’s John Cena, MLB All Star Max Scherzer, UFC World Champion Jon “Bones” Jones, and many more!

You can visit our YouTube Channel and watch over 1500+ before/after videos of Nick and his team’s work!  Off Leash K9 Training has more documented videos than any dog training business in the entire world!