Seasoned Systems & Network Administrator (SEC+/NET+/LPI+)

BRIAN A. DUFF

**** ***** **** **, ******, Texas 76571 254-***-**** ********@*****.***

SUMMARY

Seasoned Systems and Network Administrator with over 15 years of experience supporting U.S. Army intelligence operations across secure environments, including SIPR, NIPR, and Coalition networks. Expertise in managing enterprise infrastructure, including Active Directory, VMware, and NetApp storage systems, with a strong focus on cybersecurity and Information Assurance compliance. Accomplished Linux and Windows Administrator. Proven ability to support and sustain mission-critical platforms such as DCGS-A and TGS in global operational settings. Holds a Top Secret – SCI clearance with CI Polygraph and multiple industry certifications.

CORE PROFICIENCIES

Systems Administration

Network Administration

Virtualization Technologies

Active Directory Management

Cross-Domain System Support

Information Assurance & Security Compliance

Database Administration

Technical Troubleshooting

Linux Administrator

End-User Training & Support

System Integration & Deployment

Configuration & Patch Management

PROFESSIONAL EXPERIENCE

SEMPER VALENS SOLUTIONS, INC. 05/2022 - 12/2024

FIELD SOFTWARE ENGINEER/SYSTEM ADMINISTRATOR

As a Senior Field Software Engineer with Semper Valens Solutions, Inc., I provide comprehensive support for the U.S. Army’s DCGS-A systems, overseeing system administration, network management, and virtualization across secure environments.

Administered enterprise-level Active Directory environments, supporting over 500 users and 350 workstations across geographically dispersed locations.

Delivered advanced field support and life-cycle sustainment for DCGS-A and ISR systems, ensuring consistent mission readiness in both deployed and remote operations.

Enforced cybersecurity compliance by implementing IAVAs, applying security patches, and conducting vulnerability assessments using NESSUS, ACAS, and WSUS.

Managed virtualized infrastructures using VMware, maintaining over 175 virtual machines, both Windows and Linux, with a sustained 99% operational readiness rate.

COMMUNICATION AND ELECTRONICS COMMAND (CECOM) 07/2021 -05/2022

INTELLIGENCE ELECTRONIC WARFARE LOGISTICAL AREA REPRESENTATIVE

As an Intelligence Electronic Warfare Logistical Area Representative at CECOM, I provided technical expertise and support for a range of ISR systems, including Military Intelligence Systems, Tactical Ground Station (TGS), and Prophet platforms.

Provided advanced technical support and expertise for ISR systems, including DCGS-A, Tactical Ground Station (TGS), and Prophet platforms.

Advised military personnel on operational procedures, system maintenance, and troubleshooting to ensure optimal mission readiness.

Investigated and resolved complex system malfunctions, implementing effective corrective measures to maintain system availability.

Conducted comprehensive training for military and civilian personnel, enhancing technical skills and system reliability.

TOBYHANNA ARMY DEPOT 03/2016 - 06/2021

FIELD SOFTWARE ENGINEER/SYSTEM ADMINISTRATOR

As a Field Software Engineer at Tobyhanna Army Depot, I provided expert support for the installation, configuration, and troubleshooting of DCGS-A systems. Played a key role in system updates and deployments to sustain mission readiness and operational effectiveness.

Delivered comprehensive installation, configuration, and sustainment support for DCGS-A systems in diverse operational environments.

Administered Active Directory services for over 500 users and 350 portable workstations, ensuring secure and reliable access across multiple locations.

Maintained strict compliance with Information Assurance policies by implementing IAVAs, hotfixes, and security patches across all supported systems.

Assisted in the deployment and integration of updated software and system configurations to ensure continuous mission readiness.

GENERAL DYNAMICS INFORMATION TECHNOLOGY 06/2014 - 03/2016

FIELD SERVICE SOFTWARE ENGINEER/SYSTEM ADMINISTRATOR

As a Field Service Software Engineer at General Dynamics Information Technology, I supported multi-network environments including NSANET, SIPR, NIPR, and JWICS by administering Active Directory, troubleshooting technical issues, and providing training to military personnel to maintain system availability and operational readiness.

Supported secure multi-network environments including NSANET, SIPR, NIPR, and JWICS to ensure continuous system availability and security.

Administered Active Directory, managing user accounts and permissions to uphold network integrity and compliance.

Diagnosed and resolved complex hardware and software issues, minimizing downtime and maintaining operational readiness.

Delivered technical training and support to military personnel, enhancing system proficiency and effective usage.

ENGILITY CORP 01/2011- 06/2014

SR. FIELD SOFTWARE ENGINEER

As a Senior Field Software Engineer, I delivered comprehensive software support and sustainment for military intelligence applications across diverse operating systems, including Windows, Solaris, and Linux.

Provided comprehensive software support and sustainment for military intelligence applications across Windows, Solaris, and Linux operating systems.

Executed timely system updates and patch management to maintain operational readiness and compliance with security standards.

Diagnosed and resolved complex technical issues, ensuring high availability of mission-critical systems.

Delivered targeted training and technical support to military and civilian personnel, enhancing system utilization and effectiveness.

EDUCATION

WESTERN GOVERNORS UNIVERSITY

Bachelor of Science (BS) in Information Technology (Current Student)

CENTRAL TEXAS COLLEGE KILLEEN, TEXAS 2014

Associate of Applied Science in Computer Information Systems

CENTRAL TEXAS COLLEGE KILLEEN, TEXAS 2017

Associate of Applied Science in Disciplined Studies

CENTRAL KITSAP HIGH SCHOOL SILVERDALE, WA 1985

High School Diploma

CERTIFICATION

Security+ CE Certification, Linux+ CE Certification, Network+ CE Certification

Novell CLA11 Certification, Novell LPCI-1 Certification

Windows 10 Certification

Contact this candidate