Skip to main content

About Frequentis Defense, Inc.

The global threat landscape is constantly evolving. Innovative technological capabilities and closer collaboration among joint and coalition forces are increasingly important mission-success factors in military and humanitarian contexts. Central to our philosophy and the design of our product portfolio is the universal value Frequentis places on safeguarding human lives and defending the freedoms so essential to prosperity.

For over seven decades, Defense products and services of Frequentis globally, have provided military organizations around the world with mission-critical communication, information and surveillance solutions. Our solutions provide a fully redundant, highly available communications framework to support military services in assuring combat readiness throughout the preparation and execution of operations. Additionally, Frequentis Defense, Inc., headquartered in Columbia, Maryland, offers the US Department of Defense (DoD) a broad portfolio of mission-critical products and capabilities. Secure, inter-service collaboration and shared situational awareness increase the accuracy and reliability of information, enabling improved, intelligent decision making. This supports rapid and precise responses in critical situations.


Brian R. Bruckbauer is since April 2024 president of Frequentis Defense Inc. (FDI) and leads a technologically driven team that delivers advanced, mission critical communications and information systems solutions for U.S. and global military customers. The team is evolving into in-demand technology market areas such as state-of-the-art IP-based voice communications systems, advanced situational awareness and safety capabilities, as well as fixed and deployable digital air traffic control systems. 

John J. Theuerkauf serves as Vice President at Frequentis Defense Inc. (FDI), where he leads the engineering organization and the Command and Control (C2) business unit. His team delivers mission-critical communication systems to U.S. and global military C2 customers, including command posts, air operations centers, mobile command posts, and joint operations centers. 

Brad Kay leads the sales team at Frequentis Defense Inc. (FDI), having joined the company with the acquisition of a number of voice communication businesses from L3Harris. Previously he led the C4i Voice Communications business within L3Harris for North America. In this role he is responsible for sales, delivery and support of Voice Communication System (VCS) solutions for defense and homeland security customers.

Military Air Traffic Control

Defense organizations face the challenges of modernizing critical voice communications systems (VCS). Frequentis is an industry leader providing VCS to 40% of today’s global market. Modernizing and implementing innovative technologies and enhanced capabilities ensures dependable mission execution with long-term lifecycle management in mind. Our core offering, under continuous improvement since 1948, is a wide range of Air Traffic Control (ATC) communication and automation solutions. Learn more about how Frequentis is leading the transition from analog and time division multiplexing (TDM) to IP in air traffic control.



Rethinking traditional Air Traffic Control: Frequentis Defense, Inc. delivers the newest digital tower intelligent transport technologies to modernize air traffic control. The Digital Tower is innovative technology driven by a world of increased automation, evolving network protocols, integration between traditional legacy platforms and enhanced new capabilities, and increased need for greater and more collaborative situational awareness.


Secure Communications

Executing warfighting operations, managing and protecting homeland security, engaging in humanitarian missions and responding to natural disasters demand innovative technologies to provide greater efficiencies when collaborating with mission partners across multiple domains.



GuardX is a unified recording and replay tool for defense missions providing a complete view of all communication, navigation, and surveillance sources. Focusing on fast and efficient investigation, it addresses Command & Control, ATC, Intelligence, and many other applications. By focusing on recording video, voice, and data including radar feeds it contributes to the efficient and accurate compilation and guaranteed secure sharing of mission reports with authorized parties.


Situational Awareness

Both global and local situational awareness are critical elements in effective functioning and intelligent rapid response. Local information is required for efficient actions to meet immediate tactical needs. Global information is required for coordinated operations with other US Defense units, coalition forces and civilian services to meet strategic goals.



Alongside communications and navigation, surveillance is at the heart of air traffic management. The aim of all surveillance infrastructure is the provision of safe, efficient and cost-effective air navigation services. Optimized surveillance infrastructure allows routes to be brought closer together, resulting in increased capacity.


Foreign Military Sales

Frequentis Defense, Inc. is committed to strengthening allies and partners worldwide to meet their sovereign defense requirements and improve their ability to operate with US forces and address shared security challenges.



Frequentis' range of professional services for safety-critical environments include a variety of offerings to meet the specific needs of the US Department of Defense (DoD). These offerings range across the board from Consulting through Engineering and Design to Customized User Training.



Meet us at the following upcoming events:

Frequentis Events Overview

Working at Frequentis Defense

For more information about working at Frequentis Defense please contact


Manage cookies