Matthew Diaz is the founder and President of Commonwealth Protective Services LLC. A licensed Pennsylvania Private Investigator and ACT 235 Agent, Matthew brings over 15 years of experience in law enforcement, security, and executive protection. He is a Certified Forensic Interviewer, NRA Law Enforcement Instructor, and Red Cross First Aid/CPR Instructor. Formerly a Senior Probation/Parole Officer and U.S. Marshals Service Contracted Detention Officer, Matthew now leads CWPS in delivering professional, discreet, and legally sound investigative and protective services across Pennsylvania and beyond.
Tony leads CWPS’s consulting division, bringing unparalleled insight into risk assessment and facilities security planning. With a strong background in business security solutions, Tony has developed strategies that empower clients to mitigate threats proactively. Tony’s focus on customized security consulting ensures that every client receives solutions tailored to their unique needs.
David oversees CWPS’s private investigations division, ensuring meticulous attention to detail and professionalism in every case. With years of investigative experience in both the private and public sectors, David’s years as a Federal Agent have given him the skills needed to uncover critical information while maintaining discretion and integrity.
Kevin brings precision, expertise, and a results-driven approach to the field of private investigation. With a strong foundation in data analysis and development honed through years of experience in leading financial and pharmaceutical institutions, he offers a unique advantage in uncovering critical insights and solving complex cases.
Kevin’s background in these sectors has equipped him with advanced skills in detecting patterns, mitigating risks, and analyzing complex data sets. Whether it’s fraud investigations, asset tracing, or due diligence, his investigative strategies are built on a thorough understanding of systems and technologies.
He prides himself on combining traditional investigative methods with cutting-edge analytical tools to deliver accurate, timely, and actionable intelligence to our clients.
Brian is a seasoned Executive Protection Specialist with a proven track record in high-stakes environments. He brings a unique combination of tactical expertise, situational awareness, and client-centered professionalism to every assignment with a steadfast commitment to safety, discipline, and precision.
As a certified NRA Firearms Instructor, Brian is passionate about responsible firearm education and skill development. He provides comprehensive firearms training that emphasizes safety, accuracy, and legal responsibility—equipping civilians, professionals, and security personnel alike with the tools they need to operate confidently and competently.
In addition to his instructional work, Brian holds Act 235 certification (Lethal Weapons Training Act) in the state of Pennsylvania, authorizing him to carry and deploy firearms and other lethal weapons in the performance of his professional duties. His extensive knowledge of use-of-force protocols, conflict de-escalation, and physical security strategies makes him a trusted asset in protective services.
Whether serving in a corporate executive detail, teaching the next generation of responsible firearm owners, or securing high-risk environments, Brian combines tactical precision with a principled approach to personal and public safety.
