Professional Cyber Secuirty Engineer advisor seeking ISSO positon

WILLIAM L. LEIGHTON

Benton, ***** Louisiana

******@*****.*** / 717-***-****

SUMMARY

Information Systems Security professional with 22+ years of experience in federal and enterprise environments, specializing in vulnerability management, security control implementation, and operational oversight. Skilled in administering and interpreting outputs from tools such as CrowdStrike, Splunk, Tanium, and Azure to support threat detection, incident analysis, and compliance efforts. Proven ability to lead analysts and engineers in resolving findings, maintaining audit readiness, and producing actionable security metrics. Has a current Secret and Interim TS clearances, with a strong record of aligning security operations with mission requirements.

SKILLS

●Categorize Vulnerability Management & Remediation Tracking

●SIEM Operations & Event Correlation (Splunk)

●Identity & Access Control (IAM)/LDAP & PKI

●DISA STIGs & DoD Cybersecurity Standards/FedRAMP

●Threat Analysis & Log Review

●Assess controls and readiness of systems

●NIST 800-53 RMF

●Incident Response Oversight

●Endpoint Hardening – Windows & Linux

●Virtualization & Cloud Security (Vmware, Azure)

●Prepare for Security and Privacy risks

●Security Engineering Support & Advisory

●Architecture Reviews & Control Gap Analysis

●Metrics for Remediation & Audit Readiness

●Implement and document controls deployed

EXPERIENCE

CYBER ENGINEER ADVISOR / GDIT - Bossier City, LA 06/2017 - 12/2024

●Hardened federal systems against simulated and emerging cyber threats by deploying and configuring CyberArk PAM, CrowdStrike, ForcePoint, Splunk Enterprise, Tanium, and Tenable Security Center—resulting in zero breaches during red team assessments.

●Applied DISA STIGs to enhance system compliance and resilience, directly contributing to the organization's sustained federal cybersecurity accreditation and audit readiness.

●Delivered technical training across three platforms—phone support, regional conferences, and on-site in San Antonio, TX—empowering over 200 end-users to leverage security tools effectively.

●Recognized for driving user adoption and customer satisfaction through clear, technical communication and practical demonstrations, leading to repeat training requests and commendations from federal clients.

TECHNOLOGY LEAD - US, CISO ANALYST / Infosys Ltd. - Milwaukee, WI & York, PA. 11/2012 - 02/2017

●Developed and rolled out an enterprise-wide Vulnerability Management program, training 30+ staff and accelerating remediation efforts—closing 60% of identified vulnerabilities within the first month of implementation.

●Conducted threat intelligence reviews to proactively flag emerging vulnerabilities, enabling faster mitigation planning and improving the organization's threat anticipation capability.

●Streamlined incident response by fine-tuning qRadar and Nessus Professional, cutting false positives by several hundred and enhancing detection accuracy across network and endpoint activity.

●Collaborated cross-functionally with IT operations and infrastructure teams to resolve system-level vulnerabilities, integrating ticketing workflows for faster resolution cycles.

●Mentored distributed cybersecurity teams on detection strategy, triage, and escalation protocols; received praise from the CIRT managers for effective knowledge sharing and operational support.

APPLICATION SYSTEMS ADMINISTRATOR / Harley-Davidson Motor Company - Milwaukee, WI 09/2007 - 10/2012

●Led the SAP BPC 7.5 upgrade for the Global Manufacturing Environment at Harley-Davidson's New York factory, improving system performance and reporting accuracy across production operations.

●Migrated legacy infrastructure to virtual environments, cutting annual hardware expenses by several thousand dollars and improving system scalability.

●Deployed IBM Information Server for Harley-Davidson Financial Services projects, completing implementation three months ahead of schedule and accelerating data integration timelines.

●Maintained high system uptime and reliability by managing timely server software upgrades and enforcing strict access controls across user groups.

●Mentored two interns on AIX administration; one was offered a full-time role post-internship due to improved operational knowledge and demonstrated technical growth.

EDUCATION AND TRAINING

MS.: Homeland Security – Information Security & Forensics

Pennsylvania State University - World Campus - York, PA

●Graduated with honors bestowed by the Order of the Sword and Shield - Omicron Sigma Sigma

●Granted Certificate from NSA and Penn State for completing a degree certified by the US Government

BS: Management Information Systems

University of Wisconsin - Parkside - Kensosha, WI

PROFESSIONAL MEMBERSHIP

●Proud member of InfraGard

●GTIA North America member

CERTIFICATIONS

●ITIL V4 Foundations, September, 2019 - Present

●CompTIA Security+ CE, February, 2025 - Present

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