Brett Anthony Koerner
TS/SCI Clearance 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.
Overview
10
10
years of professional experience
1
1
Certification
Work History
Network Engineer
Lockheed Martin
King Of Prussia, PA
03.2025 - Current
- Developed comprehensive documentation for network infrastructure and configuration details.
- Configured 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
Tampa, FL
01.2024 - 03.2025
- 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
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
Dining Room Manager
Medford Leas
Medford, NJ
01.2017 - 10.2018
- Supervised activities of dining room staff to maintain service levels and support guest needs.
- Provided leadership, insight and mentoring to newly hired employees to supply knowledge of various company programs.
- Checked with guests to get feedback on food served, resolve issues, bring additional items and refill beverages.
- Explained goals and expectations required of trainees.
- Implemented cost-saving measures to reduce operating expenses while maintaining high levels of quality and customer satisfaction.
Tree Removal Engineer
Elite Landscape Services
Voorhees , NJ
05.2015 - 08.2016
- Followed all safety guidelines when operating heavy machinery such as cranes, loaders.
- Operated aerial lifts, chippers and stump grinders as needed for removal projects.
- Prepared work sites by clearing away brush and debris prior to cutting operations.
- Removed dead, diseased or hazardous branches from trees using various cutting tools.
- Maintained records of daily activities including number of trees cut and hours worked.
Education
Bachelor of Science - Cybersecurity
James Madison University
Harrisonburg, VA12-2025
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
- Windows
- MacOS
- 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
- Antivirus software
- Angular
Certification
- CompTIA Security+
- Certified Ethical Hackers
- Advanced Satellite Operators
- Corporals Leadership
- USMC program-Black Belt Degree
- Advanced Radio Operators
- Cryptologic Security Officer
Timeline
Network Engineer
Lockheed Martin
03.2025 - Current
Field Software Engineer
L3Harris
01.2024 - 03.2025
Server Administrator
USMC
10.2018 - 10.2023
Dining Room Manager
Medford Leas
01.2017 - 10.2018
Tree Removal Engineer
Elite Landscape Services
05.2015 - 08.2016
Bachelor of Science - Cybersecurity
James Madison University
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