who we are

At SAG, we believe that effective security begins with the identification of information critical to the company’s success as well as the independent analysis of critical personnel and physical infrastructure supporting protection of that information.  

We have a network of former military and intelligence personnel who have worked some of our nation’s toughest problems. SAG is able to analyze and develop policies, programs, process, and training to ensure the integration of technology and personnel are focused on information protection.  

We are a licensed Virginia Private Investigation company, and provide services that ensure the personnel with access to your company’s critical information meet security requirements and continued review for access to that information.  

With SAG providing valuable perspectives and insights, company leadership can be confident navigating dynamic international, government, and commercial environments.


SAG is owned by retired U.S. Navy Cryptologist, Dave Snell. Dave is an accomplished senior security consultant to government and industry clients. He provides cyber and national security expertise in risk management, security program, and strategic planning. A career of Intelligence Community and Special Operations experience provide the backdrop to asymmetric thinking towards developing solutions to our clients’ greatest challenges. 

Dave holds Master’s degrees in National Security and Strategic Studies from the Naval War College and Management/Information Systems from the Florida Institute of Technology, a Bachelor’s degree in Economics from the Georgia Institute of Technology. 

He is also a Certified Information Systems Security Professional (CISSP), Project Management Professional (PMP), and licensed Private Investigator (PI).


Post military work includes cyber risk management analysis and reporting to Fortune 100 companies as well as the identification of new and evolving technologies for unique incorporation to leaders’ planning efforts against our nation’s adversaries.


With nearly 30 years of experience, he excels in fast-paced, dynamic environments leading diverse and dispersed teams of varying size and technical expertise.