Milton S. Chamblee III, CASP+, Security+
VM & GRC Specialist | Tenable.sc & RMF
Newport News,VA
Summary
Vulnerability management and GRC professional with 8+ years of experience in regulated enterprise environments. Administers Tenable.sc and Nessus across 55K+ IPs and 25K+ agents, leading agent deployments and credentialed scanning across segmented zones. Builds risk‑based prioritization, SLA tracking and compliance reporting aligned with RMF, NIST SP 800‑53/171 and CMMC, empowering remediation decisions and audit readiness. Collaborates with stakeholders to reduce overdue vulnerabilities, maintain repository health, and support continuous improvement of security posture.
Overview
8
8
years of professional experience
4
4
years of post-secondary education
3
3
Certificates
Work History
Senior Systems Engineer, Cybersecurity
Infosys Public Services Inc.
Newport News , VA
07.2022 - 04.2023
- Standardized DFARS, FISMA, NIST 800-53 and NIST 800-171 practices across federal clients, improving compliance consistency and readiness.
- Centralized vulnerability tracking in Archer eGRC, delivering monthly executive risk metrics that improved remediation prioritization and decision making.
- Coordinated secure integration of more than 10 client operations during new security implementations, ensuring continuity and zero security incidents during transitions.
- Monitored emerging threats and compliance mandates, updating vulnerability management procedures within 48 to 72 hours to enhance response readiness.
- Facilitated cross-functional collaboration among 5–8 departments to align remediation priorities and reduce resolution cycle time for program deliverables.
Vulnerability Compliance and Scanning
Huntington Ingalls Industries-Newport News Shipbuilding
Newport News, Virginia
04.2023 - Current
- Administer Tenable Security Center enterprise vulnerability platform managing 55,000+ licensed IPs and 25,000+ Nessus Agents across three organizational divisions; maintain multiple Nessus Managers and distributed scanners across internal, DMZ, CUI enclave, and development zones.
- Led enterprise transition from network-based to agent-based vulnerability assessment, orchestrating phased deployment of 20,000+ agents over 8 weeks, achieving
- Manage PKI integration and TLS/SSL certificate validation across Tenable.sc, Nessus Managers, and distributed scanners maintaining secure communications; serve as SSH Credential Administrator enabling credentialed scanning across multi-site Windows and Linux infrastructure aligned with organizational security policies.
- Design and maintain multiple performance-optimized repositories for vulnerability assessment, compliance audits, and agent-based results, enforcing a
- Configure and maintain multi-platform network segmentation for scan zones (internal, DMZ, CUI enclave, development), coordinating firewall rules and ACLs with NOC and security teams; ensure reliable scanner and agent communications across distributed infrastructure supporting mission-critical vulnerability assessment operations.
Vulnerability Management and Compliance Analyst
Huntington Ingalls Industries-Newport News Shipbuilding
Newport News, VA
06.2021 - 06.2022
- Expanded vulnerability assessment coverage from 27K to 63K assets by onboarding new network segments and optimizing Tenable.sc scanning policies.
- Enforced remediation workflows and scan validation, increasing remediation rate toward 98% and reducing overdue vulnerabilities.
Investigated and resolved scan failures by addressing policy, credential, and network issues, improving scan completeness and data quality. - Developed documentation and trained administrators, standardizing scanning procedures and improving onboarding efficiency.
- Supported CMMC Level 2 readiness and RMF alignment efforts by mapping vulnerability management processes to NIST SP 800-53 and 800-171 control requirements.
Systems Application Analyst
Huntington Ingalls Industries-Newport News Shipbuilding
Newport News, VA
09.2017 - 06.2021
- Successfully managed vulnerability assessments and remediation efforts for 75,000 devices across 10+ nationwide sites at NNS.
- Achieved a remarkable 98% monthly remediation rate by the end of 2020, a substantial improvement from the previous 70%.
- Implemented effective strategies, resulting in an 87% reduction of overdue vulnerabilities by the end of 2020 while reducing Mean Time to Respond/Remediate (MTTR) from 14.5 to 5.58 days.
- Streamlined processes and reduced administrator time for remediation from 3.4 to 1.02 hours per week, significantly enhancing MTTR.
- Maintained a comprehensive internal knowledge management system for vulnerability and compliance, which elevated NNS' vulnerability management education and training initiatives.
- Recognized with the NNS Excellence in Action award in 2018 for outstanding contributions to the field of cybersecurity vulnerability management.
- Provided client support on system operation and troubleshooting.
Education
Master of Science - Cyber Operations
ECPI University
Virginia Beach, VA 08.2019 - 05.2021
Bachelor of Science - Network And Cyber Security
ECPI University
Virginia Beach, VA 06.2015 - 06.2017
Skills
Tenablesc
Certification
CompTIA Security+
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Quote
"The greatest glory in living lies not in never falling, but in rising every time we fall."
- Nelson Mandela
Timeline
CompTIA SecurityX
11-2024
Vulnerability Compliance and Scanning
Huntington Ingalls Industries-Newport News Shipbuilding
04.2023 - Current
Senior Systems Engineer, Cybersecurity
Infosys Public Services Inc.
07.2022 - 04.2023
CompTIA Security+
05-2022
Vulnerability Management and Compliance Analyst
Huntington Ingalls Industries-Newport News Shipbuilding
06.2021 - 06.2022
Master of Science - Cyber Operations
ECPI University
08.2019 - 05.2021
ITILv3
04-2018
Systems Application Analyst
Huntington Ingalls Industries-Newport News Shipbuilding
09.2017 - 06.2021
Bachelor of Science - Network And Cyber Security
ECPI University
06.2015 - 06.2017