Engineered Solutions for Complex Communication Challenges
Every project has different coverage, connectivity, and performance requirements. Zagarri Engineering develops practical wireless solutions built around each facility’s environment, infrastructure, and communication needs. By combining RF expertise, field data, system design, and testing, our team helps create dependable solutions designed for long-term performance.
DAS & In‑Building Wireless
Engineered DAS that eliminate dead zones and provide reliable indoor wireless coverage.
CBRS & Private 5G Networks
Dedicated private wireless networks built for secure, high-performance enterprise and industrial communications.
ERCES & Public Safety Communications
Code-compliant ERCES that keep first responders connected.
Wi-Fi Networks
Strong Wi-Fi performance depends on more than simply adding access points.
Within weeks of engagement, we were able to realize significant cost savings…
Jefferson County 911
Zagarri Engineering has supported the Emergency Responder Communication Enhancement System at One Cardinal Way since its implementation in 2021. Their team has been responsive, knowledgeable, and easy to work with, and they continue to help us maintain the system and stay on top of the annual testing requirements with the St. Louis Fire Department. We appreciate having a reliable partner who understands both the technical and compliance sides of these systems.
Justin Brown
Working with Zagarri Engineering was a great experience from start to finish. Our underground facility presents some unique challenges when it comes to cellular connectivity, but their team took the time to understand our needs and develop a solution that worked for our space. The improvement in cellular coverage has been tremendous, and we’re very pleased with the results.
Craig Bussen
PROJECT HIGHLIGHTS
Proven Experience Across a Range of Facilities
From 29-story towers to underground retail spaces, see how Zagarri Engineering has designed, integrated, and maintained wireless and public safety communication systems for facilities across the St. Louis region.
ERCES
One Cardinal Way
Emergency responder radio coverage for a 29-story downtown St. Louis tower, built to St. Louis Fire Department requirements.
Cellular DAS
Bussen Underground
Cellular DAS enhancement for an underground retail facility in Mehlville, Missouri, engineered for complex RF conditions.
Cellular DAS + ERCES
Bunge Headquarters
Ongoing maintenance, upgrades, and technical support for the Cellular DAS and ERCES at Bunge’s four-level headquarters.
ERCES
STLCC Meramec
Emergency responder communication enhancement for the St. Louis Community College Meramec Student Center in Kirkwood, Missouri.
One Cardinal Way Emergency Responder Communication Enhancement System
Zagarri Engineering designed and implemented an ERCES at One Cardinal Way in downtown St. Louis using ADRF public safety equipment to provide reliable emergency responder radio coverage throughout the 29-story tower. Completed in April 2021, the system was developed to meet St. Louis Fire Department requirements. Zagarri continues to provide annual inspections, RF testing, maintenance, and compliance documentation to help keep the system operational and compliant.
Reliable Emergency Communications
Ongoing Code Compliance
Long-Term System Reliability
Bussen Underground Cellular DAS Enhancement
Zagarri Engineering designed and integrated a Cellular DAS enhancement system for the Bussen Underground retail facility in Mehlville, Missouri. Using Wilson Connectivity and Zinwave equipment, the system was engineered to overcome the RF challenges of the underground limestone environment and deliver reliable voice, text, and data coverage across major wireless carriers throughout the facility.
Reliable Underground Connectivity
Multi-Carrier Coverage
Engineered for Complex RF Conditions
Bunge Headquarters Cellular & Emergency Responder Communication Systems
Zagarri Engineering provides ongoing maintenance, upgrades, and technical support for the Cellular DAS and ERCES at Bunge’s four-level headquarters in Chesterfield, Missouri. Zagarri maintains and enhances the existing CommScope ERA Cellular DAS supporting T-Mobile, AT&T, and Verizon and designed and integrated an ADRF PSR public safety repeater system to improve emergency responder radio coverage. Zagarri continues to provide annual testing, maintenance, and technical support to help maintain reliable cellular and public safety communications throughout the facility.
Cellular Coverage
Enhanced First Responder Communications
Ongoing System Maintenance & Compliance
STLCC Meramec Student Center Emergency Responder Communication Enhancement System
Zagarri Engineering designed and integrated an ERCES at the St. Louis Community College Meramec Student Center in Kirkwood, Missouri, to provide reliable emergency responder radio coverage throughout the facility. The system supports FirstNet 700 MHz and SLATER 800 MHz frequencies and includes integration with the building’s fire alarm control panel for continuous monitoring. Zagarri provided system design, integration, commissioning, and performance testing to ensure dependable communications and compliance with public safety requirements.
Reliable Emergency Communications
Public Safety Code Compliance
Integrated System Monitoring
Why Choose Zagarri?
Specialized RF engineering expertise from initial planning through long-term system support.
Zagarri Engineering brings technical experience, code knowledge, and hands-on project support to every wireless system. Our team helps simplify complex requirements, verify system performance, and keep projects moving from design through commissioning and maintenance.
Looking for Answers?
Browse educational resources covering ERCES, Cellular DAS, RF engineering, testing, and code compliance, or reach out to our team for project-specific guidance.