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Internship Senior Linux Kernel Engineer Ubuntu Jobs in Washington

Nightwing

Linux Systems Engineer

Sterling, VA · On-site

Wireshark * iproute2 * nftables * iptables Linux Kernel Tuning & Performance Optimization Tune ... Ubuntu Linux Networking Expertise Demonstrated expertise with: * Policy-Based Routing (PBR ...

Nwis

Linux Systems Engineer

Sterling, VA · On-site

Wireshark * iproute2 * nftables * iptables Linux Kernel Tuning & Performance OptimizationTune Linux ... Ubuntu Linux Networking ExpertiseDemonstrated expertise with: * Policy-Based Routing (PBR ...

Peraton

Senior Linux Systems Engineer

Herndon, VA

$104K - $166K/yr

Responsibilities We are seeking a Senior Linux Systems Engineer with a strong background in Linux ... Qualifications 6+ years managing Linux servers running Debian, RHEL, and Ubuntu Experience ...

Peraton

Senior Linux Systems Engineer

Herndon, VA · On-site

$104K - $166K/yr

Responsibilities We are seeking a Senior Linux Systems Engineer with a strong background in Linux ... Qualifications • 6+ years managing Linux servers running Debian, RHEL, and Ubuntu • Experience ...

Peraton

Senior Linux Systems Engineer

Herndon, VA · On-site

$104K - $166K/yr

Responsibilities We are seeking a Senior Linux Systems Engineer with a strong background in Linux ... Qualifications 6+ years managing Linux servers running Debian, RHEL, and Ubuntu Experience ...

Freddie Mac

Engineer, Senior (Linux/AWS)

Mclean, VA · On-site

Our constantly evolving IT department is in search of a Senior Engineer of Infrastructure ... Experience with Linux engineering, including lifecycle management, kernel patching, maintenance ...

Freddie Mac

Engineer, Senior (Linux/AWS)

Mclean, VA · On-site

Our constantly evolving IT department is in search of a Senior Engineer of Infrastructure ... Experience with Linux engineering, including lifecycle management, kernel patching, maintenance ...

Ignite IT

Senior Linux Administrator

Suitland, MD · On-site

Ignite IT is seeking a very experienced, senior-level Red Hat Linux Admin/Engineer to join and ... Engineer or Administrator. * Strong experience in Linux performance tuning , kernel parameter ...

Ignite IT

Senior Linux Administrator

Suitland, MD

Ignite IT is seeking a very experienced, senior-level Red Hat Linux Admin/Engineer to join and ... Engineer or Administrator. * Strong experience in Linux performance tuning , kernel parameter ...

Freddie Mac

Engineer, Senior (Linux/AWS)

Mclean, VA · On-site

$105K - $145K/yr

... Senior Engineer of Infrastructure Engineering. This role focuses on Linux engineering, automation ... kernel patching, maintenance, and systems integration. • Automation development experience ...

GDIT

Sr. Linux Systems Engineer

Germantown, MD

$142K - $178K/yr

Yes GDIT is seeking an experienced Sr. Linux Systems Engineer to support critical IT operations for ... Deep proficiency in Linux operating systems such as Red Hat, CentOS, or Ubuntu. * Expertise in ...

GDIT

Sr. Linux Systems Engineer

Washington, DC

$142K - $178K/yr

Yes GDIT is seeking an experienced Sr. Linux Systems Engineer to support critical IT operations for ... Deep proficiency in Linux operating systems such as Red Hat, CentOS, or Ubuntu. * Expertise in ...

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Linux Systems Engineer

Nightwing

Sterling, VA • On-site

Full-time

Re-posted 7 days ago

Job description

Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers' most demanding challenges. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies, agility, and competitive offerings to customers in the intelligence community, defense, civil, and commercial markets.
Nightwing is seeking a highly skilled Linux Systems Engineer to design, deploy, optimize, automate, and support large-scale Linux infrastructure supporting secure networking and remote-access services. This role is ideal for an engineer with deep expertise in Linux networking, policy-based routing, kernel performance tuning, infrastructure automation, and modern VPN technologies including WireGuard, OpenVPN, and IPSec.
The successful candidate will collaborate closely with network engineering, systems administration, and platform engineering teams to deliver highly available, secure, and scalable infrastructure solutions in mission-critical environments.
Primary Responsibilities
Linux Infrastructure Engineering
  • Design, deploy, administer, and maintain enterprise Linux environments.
  • Develop standardized operating system configurations and hardened baseline builds.
  • Perform operating system upgrades, patch management, lifecycle maintenance, and performance optimization.
  • Troubleshoot complex operating system, networking, and application issues.
Advanced Network Engineering
Design and implement advanced routing architectures utilizing:
  • Policy-Based Routing (PBR)
  • Multiple routing tables
  • Route maps and traffic steering
  • Source-based and destination-based routing
  • Multi-homed network environments
Configure and troubleshoot:
  • OSPF and static routing
  • VLANs, LACP, and 802.1Q trunking
  • Network namespaces
  • VRFs
  • NAT and firewall policies
Analyze and troubleshoot network traffic using:
  • tcpdump
  • Wireshark
  • iproute2
  • nftables
  • iptables
Linux Kernel Tuning & Performance Optimization
Tune Linux kernel parameters for:
  • High-throughput networking
  • Low-latency applications
  • VPN gateway performance
  • Large-scale concurrent connections
Optimize:
  • TCP/IP stack performance
  • Network buffer sizing
  • IRQ balancing
  • CPU affinity
  • NUMA awareness
  • Memory management
Utilize performance analysis tools including:
  • perf
  • sar
  • vmstat
  • iostat
  • eBPF observability tools
  • systemd performance metrics
VPN Engineering
Design, deploy, and support secure VPN infrastructures using:
  • OpenVPN 2.6+
  • WireGuard
  • IPSec
Implement and support:
  • Site-to-site VPNs
  • Remote-access VPNs
  • Hub-and-spoke architectures
  • High-availability VPN clusters
  • Dynamic routing across VPN overlays
Responsibilities include:
  • Troubleshooting encryption, routing, MTU, and performance issues
  • Implementing modern cryptographic standards and VPN hardening best practices
Configuration Management & Automation
Develop and maintain Infrastructure-as-Code (IaC) solutions using SaltStack.
Create and maintain:
  • Salt States
  • Pillars
  • Custom modules
  • Orchestration workflows
Automate:
  • System provisioning
  • Configuration deployment
  • Compliance enforcement
  • VPN deployments
  • Security baseline management
Integrate SaltStack with CI/CD pipelines and infrastructure monitoring platforms.
Required Qualifications:
Current Top-Secret Clearance with SCI Eligibility
Technical Experience
  • 5+ years of Linux Systems Engineering experience
  • 3+ years of advanced Linux networking experience
  • 3+ years of VPN engineering experience
  • 3+ years of SaltStack administration and automation experience
Operating Systems
Strong hands-on experience with:
  • Debian Linux
  • Ubuntu Linux
Networking Expertise
Demonstrated expertise with:
  • Policy-Based Routing (PBR)
  • iproute2
  • Routing tables and policy rules
  • Linux bridges
  • Bonding and teaming
  • VLANs
  • VRFs
  • Network namespaces
  • Dynamic routing protocols
  • High-availability networking architectures
VPN Expertise
Strong practical experience with:
  • WireGuard
  • OpenVPN 2.6+
  • IPSec
  • PKI and certificate management
  • TLS authentication
  • Multi-site VPN topologies
  • VPN performance tuning
Automation & Scripting
Experience with:
  • SaltStack
  • Python
  • Bash
  • Git
  • CI/CD workflows

Preferred Qualifications
  • Experience supporting cloud platforms including:
    • Google Cloud Platform (GCP)
    • Amazon Web Services (AWS)
    • Microsoft Azure
  • Experience with container technologies:
    • Docker
    • Kubernetes
  • Experience supporting confidential computing environments
  • Knowledge of CNSA-compliant cryptographic implementations
  • Familiarity with eBPF-based observability and network diagnostics
  • Industry certifications such as:
    • RHCE
    • LFCE
    • CCNP
    • Equivalent advanced certifications

Desired Skills
  • Exceptional troubleshooting and root-cause analysis capabilities
  • Strong documentation and technical writing skills
  • Ability to operate independently in mission-critical environments
  • Experience designing highly available and fault-tolerant systems
  • Security-first mindset with strong infrastructure design principles
  • Excellent collaboration and communication skills

At Nightwing, we value collaboration and teamwork. You'll have the opportunity to work alongside talented individuals who are passionate about what they do. Together, we'll leverage our collective expertise to drive innovation, solve complex problems, and deliver exceptional results for our clients.
Thank you for considering joining us as we embark on this new journey and shape the future of cybersecurity and intelligence together as part of the Nightwing team.
Nightwing is An Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age or any other federally protected class.

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