You’re in good hands with Barry Donadio the President of Public Security LLC, who is a former U.S. Secret Service tactical operator. The building is as anonymous as one could find, nestled in an industrial park in Queenstown, MD., a mid-size town on the Eastern Shore of Maryland. A small discreet sign is the only indication that there is a well-known, well-regarded security company. The office is functional, a few items including a small toy car, certificates from the states of Maryland and New York certifying that the occupant is fully licensed as a private detective and a firearms instructor. This is the office of Barry Donadio, President of Public Security, LLC, one of about 420 security agencies in Maryland. Like the office where he sits, Barry Donadio presents the image of a calm, quiet man, who’s background belies his appearance. Donadio, a native of New York, his accent still present, has always been involved with some aspect of security. The summer of his junior year in high...