Senior Linux & DevSecOps Engineer (RMF/DISA)

Bantar Ngeh

571-***-**** ️ ********@*****.*** VA 20155

Clearances: Active DHS Public Trust & Interim top secret

Professional Summary

Linux System Administrator and DevSecOps Engineer with 7+ years of experience supporting secure, large-scale federal environments (FEMA, DHS, USCIS, Navy Federal). Skilled in RHEL/CentOS/Ubuntu administration, DISA STIG hardening, patching, automation (Bash, Ansible, Python), virtualization, storage management, Kubernetes, and RMF-aligned security compliance. Experienced in deploying and maintaining Linux workloads across AWS and AWS GovCloud environments. Strong track record ensuring uptime, resolving system incidents, and supporting mission-critical 24/7 operations..

Core Competencies

Linux System Administration (RHEL, CentOS, Ubuntu)

• STIG Hardening DISA NIST 800-53 RMF Compliance

• User Management, Patch Management, Log Analysis, Troubleshooting

• Scripting & Automation: Bash, Python, Ansible, Puppet

• Virtualization: VMware ESXi/vCenter, KVM, Hyper-V

• Storage: SAN, NAS, NFS, iSCSI Backup & Recovery

• Containers & Orchestration: Docker, Kubernetes, Helm

• Monitoring: Grafana, Splunk, Datadog, CloudWatch, ScienceLogic SL1

• Networking: TCP/IP, DNS, DHCP, Firewalls, Load Balancers

• Cloud: AWS, GovCloud, Azure CI/CD: GitLab, Jenkins, Terraform

Professional Experience

Sr. Linux System Administrator / DevSecOps Engineer

OneGlobe LLC – FEMA Nov 2024 – Present

• Install, configure, and maintain RHEL/Ubuntu Linux servers supporting FEMA enterprise systems.

• Apply DISA STIGs, patch vulnerabilities, and harden OS configurations in compliance with NIST/RMF.

• Automate server provisioning and patching using Ansible, Bash, and Python scripts.

• Administer EKS worker nodes, systemd services, log services, and cloud-backed storage.

• Monitor Linux systems using CloudWatch, Datadog, Grafana; troubleshoot performance issues.

• Maintain NFS/EBS storage, automate backup routines, and validate recovery procedures.

• Support ATO/RMF accreditation activities and implement corrective security actions.

• Document system configurations, procedures, and troubleshooting runbooks.

• Collaborate with networking/security teams to resolve Linux infrastructure issues.

Linux System Administrator / DevSecOps Engineer

DHS – USCIS Aug 2022 – Nov 2023

• Administered RHEL and Ubuntu servers across mission-critical DHS workloads.

• Performed patching, kernel updates, STIG enforcement, and user access control.

• Automated compliance scans and security remediation using Ansible and Bash.

• Managed Docker/Kubernetes clusters supporting backend USCIS microservices.

• Troubleshot system crashes, memory/CPU constraints, network issues, and SELinux events.

• Integrated IAM controls, MFA, and PAM hardening into Linux systems.

• Managed NFS storage, EFS mounts, system backups, and recovery validation.

ScienceLogic Apr 2019 – Nov 2023

• Installed and maintained RHEL Linux servers powering SL1 monitoring platform.

• Automated provisioning using Terraform, Ansible, and VMware templates.

• Managed Kubernetes clusters, Docker containers, and CI/CD deployment workflows.

• Performed OS patching, volume resizing, log analysis, storage configuration (NFS/SAN).

• Developed Bash/Python scripts to automate repetitive administrative tasks.

Linux Systems Administrator – Navy Federal Credit Union

Feb 2018 – Mar 2019

• Maintained Linux systems supporting financial applications and regulatory workloads.

• Performed patching, filesystem expansion, service configuration, and performance tuning.

• Supported VMware environments: VM creation, snapshots, CPU/memory adjustments.

• Automated server provisioning using Ansible roles and shell scripts.

• Responded to tickets for Linux incidents in a 24/7 enterprise environment.

• Supported development/SRE teams in resolving Linux-related performance issues.

Linux/Windows Systems Support Engineer – Verizon

Feb 2015 – Mar 2016

• Administered Linux and Windows servers in enterprise production environments.

• Performed OS patching, log monitoring, file system tuning, and troubleshooting.

• Managed VMware ESXi VMs, storage expansions, and system health checks.

• Installed SEP on Linux servers and remediated Nessus/Tenable findings.

• Maintained user accounts, permissions, and access controls across environments.

Education & Certifications

• CompTIA Security+

• CompTIA Linux +

• AWS Certified Solutions DevOps – Professional

• AWS Certified Solutions Architect – Associate

• B.A., Information Technology– Land Mark Metropolitan University

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