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Nassau County Dog Trainers

Our mission is to provide exceptional and progressive balanced dog training, with the highest quality service. The goal is to allow our clients to have a better experience by unleashing their dog’s true potential and guiding dog owners. The process includes helping dog owners understand, communicate, work with their dogs, resolve training challenges and behavior problems in a real world setting.

We have a team of dog trainers and dog behaviorists in Nassau County, Suffolk County, Queens, Brooklyn, and Manhattan areas with the passion of helping dog owners achieve a happy and harmonious relationship with their dogs. From the simplest to most severe behavioral problems, K9 Mania dog training will consistently deliver results that are proven to exceed our clients’ expectations.

We work with all breeds, any dog, and any problem. If you are ready to transform your dog and your life, we are ready to help!


Elliot Rosenberg dog trainer and behaviorist

Elliot Rosenberg

Dog Trainer/ Dog Behaviorist

Born in Long Island, Elliot Rosenberg is a Certified Master Trainer and Behaviorist who joins positive reinforcement with balanced training methods to instill trust and respect in the dogs he trains.

For over 10 years he has rehabilitated and trained hundreds of happy dogs to compete professionally in obedience, tracking, herding, agility, and protection sport. Fostering a lifelong love for learning how dogs communicate, he coaches dog trainers and pet parents on basic and advanced obedience, search and rescue, and behavior modification. Previously Elliot spent 7 years in Costa Rica training high-drive (working) dogs in a variety of dog sports. But his passion remains with owners who are desperate for help. Highly skilled in the diagnosis of behavior issues in dogs with aggression, fear, and separation anxiety, Elliot puts together specialized individual programs to tackle each problem. Elliot holds a B.A. degree in Psychology from Queens College. His best pet memories are of his Dutch Shepherds, Momba and Sergeant, whom he trained in elite search and rescue, and his German Shepherd, Troy Hartis, who he competed with internationally in Schutzhund and IPO/IGP dog sport.

Dog Trainer Nicole Poliseno

Nicole Poliseno

Dog Trainer/ Dog Behaviorist

Previously the owner of a successful dog training business, Dog Trainer and Behaviorist, Nicole Poliseno, brings a wealth of experience to K9 Mania. She has spent over 16 years helping some of the most desperate dog owners root out bad habits

often before they start. Nicole believes that if all dog owners do their homework and are proactive about finding the best trainer for their dogs when they are young, there would be fewer dogs in shelters. She trained guide dogs in obedience for the Guide Dog Foundation for the Blind and has been a speaker and advocate for this worthy cause. Nicole trained under Anthony Jerone and holds a Master Dog Training Certificate from the Academy of Canine Education, Inc. She is also qualified in Animal First Aid. One of her proudest achievements was when she trained her tick and flea-ridden stray husky mix, Zak. Nicole is ready to help you take the first step towards a happy and fulfilling relationship with your dog for many years to come.

Dog Trainer Jake

Jake Muller

Dog Trainer/ Dog Behaviorist

Jake Muller is a Certified Dog Trainer from Oceanside, whose family has been raising award-winning show dogs all his life. Surrounded by these skilled trainers, understanding dogs became second nature, which is why he has spent the last 5 years working with dogs to help improve their behavior and help them live happier lives.

Working at K9 Mania Dog Training, Jake has touched the lives of so many fur parents by helping them with their dog’s behavioral issues. Thanks to his presence at our dog training facility in Deer Park, Long Island, he helps transform even more lives along with everyone else on the staff.

One of the recent families he’s helped is a German Sheperd Collie mix named Solo that struggled with crippling anxiety. Before meeting him, Solo used to refuse to leave the house and would bite his owners without warning. His owners were struggling to administer medication to calm him down and were even considering putting him to sleep. But after 3 weeks of training with Jake and the K9 Mania Dog Training family, Solo is now almost completely off his medication and is even willing to go on adventures with his family.

“I believe the most difficult behavior I’ve helped work with are fear and anxiety. There are dogs whose fears are so crippling that anything out of their comfort zone completely shuts them down. For some dogs, moving away from that kind of fear can be a very long process, while other dogs can overcome fear more quickly with the right support. You can never know how long this process can take. My advice to everyone dealing with that kind of crippling fear is just to be patient.” — Jake’s advice for working with fearful and anxious dogs.

To Jake, the most rewarding part of being a dog trainer is changing the lives of dogs AND their owners. Seeing the owners go from miserable to living the happiest life possible with their dog makes all the work absolutely worth it.

His approach to teaching is supportive, practical, and friendly and has earned the trust of many fur parents. Jake is a balanced dog trainer and uses all training methods at his disposal to achieve the best result. He believes that every dog is different and that every training style is unique to every dog. 

Training is a complicated process, and it can be frustrating for dog owners when the usual methods don’t work. Jake’s advice for dog owners is to simply ask for help, get educated, and exercise patience. By seeing and learning other training methods, dog owners can find out what training style suits their dog the most.

Jake loves boxers, partly due to his admiration and respect for his grandmother’s work with them in dog shows. He considers them an extremely intelligent and fiercely loyal breed.

Philip Gray

Dog Trainer/ Dog Behaviorist

Philip Gray is a consummate animal lover and a dedicated dog trainer who is committed to helping fur parents have a more harmonious life with their dogs. He is particularly effective at fixing behavioral issues that are common among untrained dogs such as leash pulling and nipping.

Due to Philip’s experience, while working in the healthcare industry, he has developed a passion for helping others. This is exactly what he does as a dog trainer, where he correct bad habits and embarrassing behavior in dogs.

Philip’s commitment to working with dogs is also heavily influenced by his dream of becoming a K-9 trainer for military dogs in his younger years. Together with his love of working with animals, he is now using his talents to build deeper connections between dog owners and their dogs through effective communication.

A big part of how Philip trains dogs is using his empathy to understand the dogs he is training and their needs. Like any good dog trainer, he understands that every dog is unique and should be handled based on individual circumstances. This is his secret to successfully modifying behaviors and teaching dogs to obey commands.

Aside from dog training, enjoys cooking and going skiing. He also has a Belgian Malinois and a German Shepherd that he loves taking to the beach.

Dog Trainer Ashlee Stanco​

Ashlee Stanco​

Dog Trainer/ Dog Behaviorist

Ashlee Stanco is an exceptionally experienced dog trainer, with the qualifications and skills to easily handle dogs in need of rehabilitation, behavioral coaching, and learning basic obedience.

She has been building up her repertoire of dog training know-how over the last 6 years and has perfected her positive reinforcement approach to training dogs.

Now, she’s with K9 Mania Dog Training and has been hard at work in helping fur parents get a handle on their aggravating dog problems. Ashlee works with anxious and frustrated dog parents to give them the tools and confidence they need by introducing steps to make training a lifestyle.

Ashlee’s method of teaching basic commands and encouraging major behavioral changes in dogs favors a nurturing and understanding process. She employs a gentle mindset when dealing with dogs of all ages, genders, and temperaments. This has allowed her to change the lives of hundreds of dogs and dog owners throughout her career. Whether the dog is aggressive, scared, barks, bites, in need of leash manners or socialization, or just getting used to a new family member, Ashlee can help. 

Before joining K9 Mania Dog Training, Ashlee worked as a mentoring dog trainer for groups and individuals. She assessed dogs on their behavior and recommended corrective action using positive reinforcement. Ashlee’s comprehensive and holistic approach to training means that both you and your dog will be happier and more peaceful in no time—and THAT makes Ashlee happy.

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Janine Cantalupo

Dog Trainer/ Dog Behaviorist

Janine Cantalupo is a highly accomplished dog trainer who has dealt with an extensive number of cases involving dog behavioral issues with exceptional professionalism.

This led to her numerous successful resolutions of cases where desperate dog owners simply didn’t know what to do or who to turn to. Her vast experience, considerable expertise, and unbending work ethic have been a major godsend to K9 Mania Dog Training.

Janine’s track record with clients, both before and after joining the K9 Mania Dog Training family speaks volumes of her capabilities in fixing embarrassing or undesirable dog behavior. Her outstanding interpersonal skills are also a huge asset in allowing her to work with frustrated dog owners.

In fact, Janine makes it a point to stay in touch with clients even after their dogs have graduated from their training programs. This is why her clients put so much trust in her ability to solve their dilemmas involving their dogs. It also gives clients proof of her devotion to her calling as a professional dog trainer.

Janine has been an avid animal lover from a young age and grew up surrounded by them, particularly dogs. This allowed her to become comfortable around canines and ignited her desire to work with them in a professional capacity. Janine has an excellent sense of humor and a deep devotion to providing safe havens for dogs. 

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Jaimie McKeon

Dog Trainer/ Dog Behaviorist

Jaime is a Certified Dog Trainer, grew up around dogs all his life. As his mom was working in pet adoption and vet facility, he has become more aware and exposed to understanding dogs and their nature.

A passionate believer of consistency in training dogs, Jaime is an expert at determining a dog’s unique temperament. Jaime is a positive and patient trainer and he believes that he can help owners to understand their dogs and helps them what to expect. Jaime earned his dog training certificate from Penn foster and got his experience in volunteering in a local dog service. He also received a certificate from PetTech for completing the K9 CPR/First Aid course. Jaime started dog training professionally in 2013 where he worked with different clients and dog breeds one-on-one and even online. Jaime helps manage aggressive and nervous dogs as well as helping owners to get their attention. He believes that patience, understanding, and consistency will help owners understand their dogs better. He hopes that through this, more owners will be educated and fewer dogs will be given away or abused. When he’s not working, Jaime enjoys martial arts and ice hockey. He also likes to exercise and play with his kids and 3 dogs at home.

John Holian - K9 Mania Dog Trainer

John Holian

Dog Trainer/ Dog Behaviorist

John Holian has been a professional dog trainer for over 22 years. He has the experience and expertise to help fix dog problems that are caused by miscommunication and a lack of focus.

John specializes in training dogs to view their owners as being more worthy of their attention compared to everything else and through the dog’s natural drive.

John absolutely loves working with fur parents who want a deeper, more meaningful relationship with their canine companions. He helps them understand their dogs on a fundamental level by establishing effective communication.

His track record for successful cases speaks for itself with numerous clients referring him to other dog owners in need of his expertise. His approach to training results in a balanced relationship between owners and their dogs, which leads to more happiness and satisfaction.

John’s father had a huge influence on his dog training philosophy thanks to the patience that he showed in training his childhood family dog, Maeve. This happy memory and his own love for dogs are what drive him to help others experience the same level of satisfaction with their own canine companions.

John has three dogs. The 1-year-old bulldog Mable, the 5-year-old Mountain dog Millie, and the 9-month-old German Shepherd Tony. He has been married for 18 years and has four boys and two girls. He is also involved in training dogs via the IGP for Tracking, Obedience, and Protection skills.

Our Team

K9 Mania Dog Training’s mission and promise to you is that we will provide the best and most progressive balanced dog training, with the highest quality service.

Our Method

K9 Mania Dog Training is a balanced dog training company Together, with our team of dog trainers and dog behaviorists…

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