Summary
Overview
Work History
Education
Skills
Websites
Certification
Timeline
DEVELOPMENT
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Mark Williams

New Braunfels,TX

Summary

Detail-oriented and proactive IT professional with over 15 years of experience in system administration, customer service, and a strong dedication to cybersecurity. Proficient in deploying security tools, conducting vulnerability assessments, and maintaining 99.9% server uptime. Skilled in building ESXi, TrueNAS, and Linux servers, managing updates, and networking VMs. Certified in CompTIA Security+ and RHCSA, with hands-on expertise from TryHackMe and Hack The Box. Committed to leveraging technical proficiency and analytical skills to excel as a Cybersecurity Analyst. Passionate about continuous learning to enhance secure system operations.

Overview

15
15
years of professional experience
1
1
Certification

Work History

System Engineer

DISA (DNI Contractor)
San Antonio, TX
11.2025 - Current

Vulnerability Assessment & Remediation: Conducted comprehensive security assessments using ACAS to identify system vulnerabilities; analyzed scan results to determine operational risks and implemented remediation strategies to maintain strict DoD/DoD 8140 compliance.

Operational Guidance & Implementation: Developed and executed technical guidance for a high-priority prototype project, utilizing Ansible to automate security configurations and ensuring all infrastructure met mission-critical operational capabilities.

Data Strategy & Continuity: Engineered an enterprise-level backup and recovery architecture by configuring Veritas NetBackup within vCenter; authored standard operating procedures (SOPs) to ensure data integrity and continuous availability for virtualized assets.

Secure Infrastructure Engineering: Hardened Linux environments by implementing PAM RADIUS and advanced endpoint management via EMM and District Defend, directly mitigating unauthorized access risks and strengthening the project’s defensive posture.

Technical Advisement & Problem Solving: Collaborated with cross-functional teams to resolve complex technical blockers; performed SNMP analysis via OpenNMS to provide data-driven recommendations for network performance optimization and system health.

Communication & Briefing: Briefed mid-level management and Project managers on project status, infrastructure risks, and technical solutions, translating complex cybersecurity concepts into actionable operational guidance for non-technical leadership.

System Administrator II

Def Logix Inc.
San Antonio
04.2023 - 08.2025
  • Maintain 99.9% server uptime through infrastructure optimization and proactive maintenance.
  • Enhance data protection and regulatory compliance by implementing robust security protocols.
  • Reduce IT issue resolution time by 40% via efficient troubleshooting and root cause analysis.
  • Develop and deploy SOC environments using Malcolm and Security Onion for real-time security monitoring.
  • Conduct vulnerability scans with Nmap and OpenVAS to identify and mitigate network weaknesses.
  • Streamline system operations to improve efficiency and reliability across critical infrastructure.
  • Assist ISSM/ISSO with DoD-JSIG/NIST 800-53 compliance, POA&M management, and remediation of system vulnerabilities.
  • Support periodic security assessments conducted by the security control assessor.
  • Administer and deploy security compliance tools, including Trellix EPO, Tenable Nessus, and Security Onion.
  • Deploy network configurations to meet customer and security requirements.
  • Managed server infrastructure, ensuring optimal performance and security compliance.

IT/Client Services Specialist

Awesome Tickets Inc.
San Antonio
01.2011 - 01.2023
  • Managed IT infrastructure, resolving technical issues to minimize downtime to ensure operational continuity.
  • Implemented strategic IT solutions, enhancing system efficiency and supporting seamless ticket operations.
  • Improved customer interactions by 40% daily through optimized ticket systems and process improvements.
  • Updated and maintained website content, ensuring accurate and timely event information.
  • Optimized social media engagement on platforms like Facebook and Instagram to boost visibility.
  • Fostered vendor partnerships, streamlining inventory acquisition and event ticket sourcing.

Education

Bachelor of Science - Cybersecurity And Information Assurance

Western Governors University
Salt Lake City, UT
11-2027

Skills

  • Splunk, Wireshark, Snort, Nmap, OpenVAS, Security Onion, Malcolm, Kibana, Elasticsearch, OpenNMS
  • Windows, Ubuntu, Kali, FreeBSD, RHEL
  • Bash, PowerShell, Ansible
  • VMware, ESXI
  • DISA STIGS
  • TS/SCI Eligible

Certification

  • CompTIA Security+ August 2023 – August 2026
  • RHCSA – Red Hat January 2021 – January 2024

Timeline

System Engineer

DISA (DNI Contractor)
11.2025 - Current

System Administrator II

Def Logix Inc.
04.2023 - 08.2025

IT/Client Services Specialist

Awesome Tickets Inc.
01.2011 - 01.2023

Bachelor of Science - Cybersecurity And Information Assurance

Western Governors University

DEVELOPMENT

  • Actively utilize TryHackMe, Hack the Box, and ThriveDX to hone cybersecurity skills through real-world simulations.
  • Leverage virtual labs to gain hands-on experience with SIEM tools, Kali Linux forensics, Wireshark, and other industry-standard platforms.