Next-Door K9 Solutions was founded by Zack Barkley, a former United States Marine Corps Military Working Dog Handler. After deploying and serving alongside his canine partner, Zack developed a passion for dog training that extended beyond the military. Determined to broaden his expertise, he spent years traveling and working alongside top-tier dog trainers across the country, gaining deep insight into advanced training methodologies and canine behavior.

Zack’s professional background includes training dogs for elite military units within the special operations community, as well as preparing working dogs for private security firms focused on national defense. His extensive experience in high-stakes environments laid the foundation for the balanced and results-driven approach that defines Next-Door K9 Solutions.