Mario Arellano
Killeen
Summary
I am a Signal Support Systems Specialist with 10 years of experience in the U.S. Army, specializing in the installation, maintenance, and troubleshooting of communication and information systems. Over the past decade, I have developed deep technical expertise in tactical and strategic communication systems, including radio, satellite, and network infrastructure. I’ve led teams in both garrison and deployed environments, ensuring mission-critical communications remained operational under pressure. My responsibilities have included supporting signal operations, training personnel on communication equipment, managing secure and non-secure networks, and maintaining interoperability across joint platforms. I've consistently demonstrated strong leadership, problem-solving skills, and adaptability in high-tempo operational settings. Now, I'm looking to leverage my military communications background, leadership experience, and technical skills in a civilian or federal role where I can continue to support mission success through reliable and secure communications.
Overview
10
10
years of professional experience
1
1
Certification
Work History
Company Signal Lead
UNITED STATES ARMY
03.2023 - Current
- Supervised and trained teams of up 6+ Soldiers in the setup, maintenance, and troubleshooting of tactical and commercial communication systems, increasing department project operational efficiency by 25%.
- Led the planning and implementation of off-site communications during 6+ special projects, ensuring 24/7 secure voice and data connectivity to improve workflow and operational success.
- Developed and executed communications security (COMSEC) procedures in compliance with State, Federal, as well as organization regulations.
- Provided technical support for networks, and company communications, resolving over 90% of Communication Slant for company operations.
Signal Team Lead
Signal Team Lead
02.2021 - 02.2023
- Managed and maintained secure and non-secure communication systems, including radio, satellite, and IP-based systems.
- Supervised and trained teams of up to 4 soldiers in daily and strategic communication systems, cybersecurity protocols, and network troubleshooting.
- Earned multiple commendations for leadership, mission readiness, and technical proficiency in joint and coalition environments.
- Led the integration of mobile communication systems into operations vehicles, enhancing company communication reliability by 60%.
Help Desk
Help Desk
11.2015 - 02.2021
- Creation of user accounts in accordance with DOD as well as State and federal regulations.
- Responsible for desktop/laptop re-imaging and making sure all were following organization regulations.
- Conducted Level I and II helpdesk support for hardware/software issues, reducing downtime by diagnosing and resolving trouble tickets efficiently.
- Creating log for all daily operations and maintaining up to date.
Education
Cyber Security (AA) - undefined
Central Texas College
Killeen, Texas06.2027
Skills
- Adaptability
- Collaborative
- Analytic reasoning
- Continuous learning
- Leadership
- Critical Thinking
Websites
Certification
- US Army Germany Combat Life Safer November 2016
- US Army Fort Bliss Basic Leader Course January 2019
- US Army Fort Bliss Distribute Leader Course 2 March 2021
- CompTIA Killeen Security + November 2025
Languages
Spanish
Professional Working
Timeline
Company Signal Lead
UNITED STATES ARMY
03.2023 - Current
Signal Team Lead
Signal Team Lead
02.2021 - 02.2023
Help Desk
Help Desk
11.2015 - 02.2021
Cyber Security (AA) - undefined
Central Texas College
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