Have you tried the NICET website? There is a career center for employers. NICET level II or higher alarm techs . levels I techs are essentially trainees.
A lot of the installed/existing alarm systems are security/fire now adays (i.e., Honeywell/Ademco/DSC/Bosch for example). So, this is a good place to find experienced/certified/licensed talent
Wireless security/fire alarm systems (like 2GIG) are so easy to install Joe Schmo can do it after studying the programming/installation manuals for 30 min