Brett Anthony Koerner
Active TS/SCI W/ CI Poly
Summary
Results-oriented professional with expertise in power systems analysis, communication, and operations. Proven ability to analyze and synthesize complex data and signals, ensuring accurate project execution. Experienced with network configuration, security management, and performance optimization. Utilizes advanced troubleshooting techniques to resolve complex network issues efficiently. Strong understanding of network protocols and infrastructure management, ensuring robust and secure network operations.
Overview
1
1
Certification
8
8
years of professional experience
Work History
Network Engineer
Lockheed Martin
King Of Prussia, PA
02.2025 - Current
- Developed comprehensive documentation for network infrastructure and configuration details.
- Configured and installed routers, switches, and firewalls to optimize LAN, WAN, and wireless networks.
- Installed software updates on servers, routers, and firewalls to ensure security compliance.
- Replaced damaged hardware components to enhance overall network performance.
- Administered and managed thousands of interfaces, VLANs, and accounts, totaling over $750 million of equipment across the United States.
- Verified stability, security, and scalability of system architecture.
- Coordinated database enhancements and established new databases for improved data management.
- Provided technical support and troubleshooting assistance to software users.
Field Software Engineer
L3Harris
Florida
01.2024 - 02.2025
- Administered automation software for updates on thousands of radios and laptops throughout the state of Florida
- Coordinated software implementation scheduling and management with organizations, government agencies, and correctional facilities to optimize time management throughout the team
- Troubleshot communication issues such as data distribution, proper identifiers for specific systems, network connectivity, and power distribution
- Recorded and presented hundreds of updated systems to upper management, and identified key problems that arrived within the systems
- Controlled and managed hundreds of pieces of gear throughout Florida for a $450 million project
- Utilized automation software, scripting, and administer roles in order to successfully update laptop and radio systems
Server Administrator
USMC
Camp Lejeune, NC
10.2018 - 10.2023
- Installed, configured and maintained network infrastructure
- Troubleshot network issues & identified root cause until resolved
- Collaborated with cross-functional teams to provide technical support
- Accountable for storage of classified material and cryptographic devices
- Loaded crypto and installed 3G, ALE, and Single Channel mission plans using CPA for HF radios
- Constructed Field Expedient Antennas for correct frequencies and wavelength
- Requested air-time and programmed VHF/UHF radios with predefined identifiers and crypto for MUOS channels
- Updated and installed versions of software and applications by implementing Python, Linux, and Powershell scripts on TS networks
- Responsible for help desk calls and issues on the TS/Secret/Unclass classification
- Administered and configured Virtual Domain Controller on HyperV/VMWare
- Utilized elevated Linux commands on Virtual Machines in order for analysts to use applications
- Coordinated with agencies to operate Hawkeyelll Lite with specific air-time dates and locations
- Administered network connectivity from servers to external sites with Satellite Communication using iDirect and ViaSat
- Trained in the O&M of all electronic equipment supporting signals intel (SIGINT) tactics & procedures
- Orchestrated and administered all satellite & server communication throughout 8 countries in Europe
- Managed & accountable for $40M of mission-essential equipment
- Implemented Java, Linux, and Powershell scripts to construct applications on servers and workstations from start to finish
- Supervised and managed 15 Marines in the unit on a daily basis
- Instructed Junior Marines on the basic and advanced knowledge of a system administrator, network engineer, and radio operator
Education
Bachelor of Science - Cybersecurity
American Military University
12-2026
Skills
- Tactical Control and Analysis Center
- Cisco switches and routers
- High Bandwidth Satellite Systems
- Panther II
- VSAT-S/M/L
- SMART-T
- L3Harris Tactical Radios
- Cryptographic devices
- Electronic Warfare Devices
- Cisco Routers/Switches
- Juniper/Palo Alto Firewalls
- Linux/Unix
- Windows Server
- Microsoft Azure
- Adobe Suite
- Putty/SuperPutty
- VMware
- Hyper-V
- Oracle
- Automation of server configuration
- JavaScript
- Python
- Powershell
- Cybersecurity software
- Firewalls
- Intrusion detection
- Network device monitoring
- Data center networking
Certification
- CompTIA Security+
- Certified Ethical Hackers
- Advanced Satellite Operators
- USMC program-Black Belt Degree
- Advanced Radio Operators
- Cryptologic Security Officer
Timeline
Network Engineer
Lockheed Martin
02.2025 - Current
Field Software Engineer
L3Harris
01.2024 - 02.2025
Server Administrator
USMC
10.2018 - 10.2023
Bachelor of Science - Cybersecurity
American Military University