Vienna infrastructure-systems contractor, certified for fire alarm.

National electrical-engineering group, certified for alarm and voice alarm.

Building-services group, certified for fire alarm.

The Austrian systems arm of the G4S security group.

Vienna security-technology house, certified since 2006.

Vienna electrical contractor, certified to 2028.

Austria's broadest voice-alarm certification, on six platforms.

Vienna building-services contractor, certified to 2030.

Vienna building-technology group, certified for alarm and voice alarm.

Austrian security-technology group with three ÜBZERT certificates.

Vienna security-technology firm, certified to 2029.

Upper Austrian security-technology firm with two certified locations.