Summary
Overview
Work History
Education
Skills
Familiar Software And Tools
References
Operating Systems
Platforms
Timeline
Generic

Louis Marshall

Columbia,MD

Summary

Over 25 years of experience in systems integration, security, and network administration. Experience in automating security and compliance checks within CI/CD pipelines, managing multiple large-scale, multi-tenant cloud, virtual, and on-premise computing systems; as well as security vulnerability assessments. Dynamic DevSecOps engineer with extensive experience in AWS administration and security audit implementation. Skilled in integrating security within CI/CD pipelines, optimizing network performance, and ensuring compliance with cybersecurity mandates to drive effective cloud solutions.

Overview

17
17
years of professional experience

Work History

DEVSECOPS / SYSTEMS ENGINEER

KeyLogic Systems
Dulles, Virginia
10.2016 - 07.2025
  • Spearheaded multiple high-level Department Homeland Security (DHS) design implementations, as per the documented project scope.
  • Implemented the administration of various AWS services, such as CLI, EC2, VPC, EMR, SSM, S3, CloudTrail, and IAM.
  • Implemented IAM role-based access controls, multi-factor authentication (MFA), and fine-grained policies to meet DHS and NIST 800-53 security requirements, testing, and securing.
  • Conducted security audits, logging, and monitoring through CloudTrail and Splunk integration, enabling compliance with DHS cybersecurity directives.
  • Performed maintenance and cloud assessment based on the applications' requirements, business needs, and ROI calculations.
  • Performed systems security integration and Linux administration for multiple operational and development environments.
  • Administered and optimized AWS services (EC2, S3, IAM, CloudTrail, VPC, RDS) in alignment with DHS security standards and FedRAMP compliance.
  • Developed DevSecOps initiatives, integrating security into CI/CD pipelines, and automating security checks across cloud platforms.
  • Architect and continuously improve infrastructure for cloud-based services and client interfaces.
  • Performed internal vulnerability assessments and penetration testing, providing remediation strategies, and verifying security patches.
  • Managed security vulnerability monitoring and intrusion detection systems.

Network Administrator

KeyW Corporation
Hanover, MD
02.2008 - 08.2015
  • Administered and maintained a Department of Defense (DoD) Wide Area Network (WAN) infrastructure, supporting government employees across multiple secure facilities.
  • Implemented, and optimized Wide Area Network (WAN) solutions across multi-site enterprise environments, ensuring high availability, and scalability.
  • Configured and maintained WAN routing protocols (BGP, OSPF, EIGRP) to optimize traffic flow and minimize latency.
  • Managed VPN, MPLS, and IPSec tunnels to ensure secure connectivity between geographically dispersed government offices.
  • Configured, monitored, and troubleshot Cisco/Juniper routers and switches to ensure 24/7 availability of mission-critical systems.
  • Conducted STIG hardening, patch management, and vulnerability remediation on WAN devices to meet federal cybersecurity mandates.
  • Performed capacity planning, bandwidth analysis, and traffic optimization to support classified and unclassified networks.
  • Provided Tier II/III WAN support, reducing downtime through proactive troubleshooting and root cause analysis.

Education

Associate of Science - Information Technology

AACC
Arnold, MD
09-2011

Skills

  • AWS services
  • CI/CD automation
  • Vulnerability assessment
  • Systems security
  • Network optimization
  • Cybersecurity compliance
  • Performance monitoring
  • Problem solving
  • Team collaboration
  • Troubleshooting and diagnosis
  • Penetration testing
  • Hardware and software installation
  • Cloud computing
  • System troubleshooting
  • Cybersecurity
  • Data analysis
  • User support

Familiar Software And Tools

  • Docker
  • Kubernetes (k8s)
  • Ansible
  • Puppet
  • Nessus
  • Atlassian Suite (JIRA, Confluence)
  • Active Directory
  • Ambari
  • LDAP
  • SECSCAN
  • Tenable
  • Dell OpenManage
  • Nifi
  • Identity Management (IdM)

References

Professional references are available upon request.

Operating Systems

  • Linux (Redhat, CentOS)
  • Unix (Solaris)
  • Windows (Server 2003-2016)

Platforms

IBM, Dell, HP, SGI, Sun, EMC Isilon, AWS (GovCloud), Azure, Rackspace, Cloudera, Hortonworks (HDP, HDF, CDH), VMware vSphere 5.x - 8.x

Timeline

DEVSECOPS / SYSTEMS ENGINEER

KeyLogic Systems
10.2016 - 07.2025

Network Administrator

KeyW Corporation
02.2008 - 08.2015

Associate of Science - Information Technology

AACC

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