I checked the Licensee Name/State search in the FCC's database using the name Guardian, checked the wildcard box, and all I found was a license for Guardian Alarms. I thought that maybe Guardian EMS might be the D.B.A. name of a corporation so I checked the Louisiana Secretary of State's corporations database. I found many entities with the name Guardian in them including Guardian EMS, LLC. Since I could not find a license under this name in the FCC's database, they may be on someone else's system.