Senior NGDE Engineer (Linux OS Engineer)

TekSynap•Reston, VA

About The Position

We are seeking a Senior NGDE Engineer (Linux OS Engineer) to join our Task Order to build, harden, and sustain mission-critical Linux platforms in a highly secure enterprise on the Defense Intelligence Agency’s Solutions for the Information Technology Enterprise III (SITE III). The Senior NGDE Engineer (Linux OS Engineer) will engineer, harden, secure, and sustain mission-critical Linux platforms across a highly secure enterprise environment. Responsibilities span lifecycle management, STIG compliance, automation, performance tuning, and cross-team collaboration . TekSynap is a fast-growing high-tech company that understands both the pace of technology today and the need to have a comprehensive well planned information management environment. “Technology moving at the speed of thought” embodies these principles – the need to nimbly utilize the best that information technology offers to meet the business needs of our Federal Government customers. We offer our full-time employees a competitive benefits package to include health, dental, vision, 401K, life insurance, short-term and long-term disability plans, vacation time and holidays. Visit us a t www.TekSynap.com . Apply now to explore jobs with us! The safety and health of our employees is of the utmost importance. Employees are required to comply with any vaccination requirements mandated by contract, applicable law or regulation. By applying to a role at TekSynap you are providing consent to receive text messages regarding your interview and employment status. If at any time you would like to opt out of text messaging, respond "STOP". As part of the application process, you agree that TekSynap Corporation may retain and use your name, e-mail, and contact information for purposes related to employment consideration.

Requirements

Active TS/SCI + CI Poly clearance
Bachelor’s degree in Computer Science , Information Systems, Engineering , or related field (or equivalent experience). BS, 10-12 years of relevant experience; MS 8-10 years; PhD, 5-7 years
5–7 years Linux administration experience in enterprise or government environments or 8+ years of experience in Linux system administration or engineering
Security+ CE certification
RHCSA or RHCE certification
Experience implementing DISA STIGs, NIST controls, and RMF compliance requirements
Ability to create SOPs, playbooks ( runbooks), and architecture documentation
Experience troubleshooting across multi-level classification domains
Experience troubleshooting compute, net work , st orage
VMware/KVM familiarity
Deep understanding of designing and implementing ITSM workflows
Hands-on automation experience with Ansible, Bash, Python

Nice To Haves

CKA certification
RHEL Satellite/Foreman, Kickstart, IdM /FreeIPA, HashiCorp Vault
Container/Cloud: Podman , Docker, Kubernetes, AWS/GovCloud, Azure
Terraform, registry/ artifact management
Monitoring/SIEM: Prometheus, Grafana, ELK/OpenSearch
Experience working with endpoints that support a multi-level classification environment
Strong proficiency with RHEL and Debian/Ubuntu systems, services, and package management
Deep expertise with enterprise Linux distributions (RHEL preferred)
Experience supporting classified environments and cross-domain systems
Strong knowledge of: Linux system internals Networking (TCP/IP, routing, firewalls) System hardening and vulnerability management Automation tools (Ansible, Bash, Python, etc.)

Responsibilities

Design, deploy, configure, and maintain enterprise Linux environments (RHEL, Rocky, CentOS, Ubuntu, or equivalent)
Build and maintain secure Linux OS baselines in accordance with DoD STIGs, NIST, and RMF requirements
Perform system hardening, patch management, and vulnerability remediation for classified environments
Automate system configuration and deployment using tools such as Ansible, Puppet, or similar automation frameworks
Engineer and maintain systems supporting cross-domain data transfer and multi-level security (MLS) environments
Support integration and sustainment of Cross Domain Solutions (CDS) enabling secure data exchange between networks of different classification levels
Collaborate with security teams to ensure proper data flow enforcement, access controls, and auditing in classified environments
Troubleshoot and resolve issues impacting secure information flow between domains
Support the architecture and sustainment of Next Generation Digital Environment (NGDE) platforms
Integrate Linux-based services with enterprise infrastructure including identity management, container platforms, and virtualization solutions
Assist in modernization initiatives including cloud integration, DevSecOps pipelines, and platform automation
Implement and maintain security controls aligned with RMF, NIST 800-53, and DISA STIGs
Conduct system auditing, log analysis, and compliance verification
Support security assessments, ATO processes, and continuous monitoring activities
Ensure all systems meet classified operational security requirements
Monitor system performance, availability, and resource utilization
Implement high-availability solutions and disaster recovery strategies
Provide Tier III engineering support for critical Linux infrastructure
Develop and maintain technical documentation, system diagrams, and standard operating procedures
Participate in engineering design reviews and architecture discussions
Mentor junior engineers and provide technical leadership within the Linux engineering team