Tailor-made security technology from Mainz and Mannheim

Hieronymus Sicherheits-Systemhaus

Hieronymus Sicherheits-Systemhaus GmbH & Co. KG, based in Mainz, is an independent systems provider specializing in the planning, installation, and service of security systems. The company implements customized security solutions – from intrusion and fire alarm systems, video technology, and hazard alarm management to access control, PA systems, and light call systems, as well as CAD-based technical documentation. The company is a certified service provider within the German Association of Property Insurers (VdS).

Hieronymus also operates a branch in Mannheim to provide optimal service to customers in the southern region around Heidelberg, Mannheim, Ludwigshafen and Karlsruhe.

To the website
Mainz location
Hieronymus Sicherheits-Systemhaus GmbH & Co. KG

Wilhelm-Theodor-Römheld-Str. 34 
55130 Mainz 

Phone: +49 (6131) 61748-0 
E-mail: info@hg.ag

Mannheim location
Hieronymus Sicherheits-Systemhaus GmbH & Co. KG

Krügerstr. 7-11 
68219 Mannheim 

Phone: +49 (6131) 61748-0 
E-mail:info@hg.ag

HSS – Where experience provides security.

Since 1976, Hieronymus Security Systems has stood for reliable, manufacturer-independent security technology. With our high level of technical expertise, CAD-supported planning, and comprehensive service, we provide our customers with tailored support – from installation to maintenance.

Many years of experience in safety-critical industries
HSS has been supporting customers in healthcare, industry, and public institutions for decades. Their deep understanding of regulatory requirements makes their solutions particularly reliable.
Precise planning with CAD-supported documentation
HSS combines technical expertise with digital planning competence. Each system is precisely documented, making maintenance, expansion, and operation significantly more efficient.
Holistic service from installation to maintenance
Whether it's initial installation, modernization, or regular maintenance, HSS remains a long-term partner. The focus is on service continuity and fast response times to ensure security at all times.