Systems Engineer with Security Clearance

L2T, LLC; Herndon (VA); On-site; USD 140,000 - 180,000; Full time

Benefits offered by this job

401(k) match

Health, dental, vision insurance

Legal resources plan

Vacation, personal/sick leave

Federal holidays

Job summary

L2T, LLC in Herndon, VA is seeking a hands-on Senior Systems/Network Engineer to design, implement, and operate enterprise Linux and network infrastructure. You will lead automation efforts, optimize security and reliability, and mentor junior engineers in a fast-growing, mission-focused team.

Candidates must have 10+ years in infrastructure engineering, strong Linux and networking expertise, SaltStack, and experience with FreeIPA, Cisco/Juniper, and virtualization.

Qualifications

• 10+ years of experience in Systems, Network, or Infrastructure Engineering.
• Expert-level knowledge of Linux administration in enterprise or mission-critical environments.
• Strong understanding of Linux internals, including system calls, processes, memory management, filesystems, and performance tuning.
• Experience designing, implementing, and supporting complex enterprise infrastructure environments.
• Hands-on experience with SaltStack (Salt) and infrastructure automation.
• Experience administering identity and access management solutions, including FreeIPA/IPA.
• Strong networking expertise, including: TCP/IP, DNS, DHCP, VLANs, VPNs.
• Routing and switching technologies (Cisco/Juniper).
• Experience with virtualization technologies, hypervisors, and VDI.
• Strong scripting and automation skills using Bash, Python, or similar languages.
• Experience developing and maintaining secure, hardened system and network configurations.
• Demonstrated ability to troubleshoot complex issues across operating systems, network infrastructure, applications, and distributed systems.
• Excellent written and verbal communication skills.

Responsibilities

• Design, implement, maintain, and optimize enterprise Linux systems and network infrastructure.
• Architect and support scalable, secure, and highly available infrastructure solutions.
• Lead automation initiatives using SaltStack and other infrastructure automation tools.
• Serve as a senior technical resource and escalation point for complex production issues.
• Perform advanced troubleshooting and root cause analysis across systems, networks, applications, and services.
• Engineer and maintain Cisco and Juniper network environments to meet performance, security, and reliability requirements.
• Administer and support identity management services, including FreeIPA/IPA.
• Develop and maintain infrastructure standards, documentation, and operational procedures.
• Evaluate emerging technologies and make recommendations for infrastructure improvements and modernization.
• Ensure systems and networks meet or exceed security, compliance, and operational standards.
• Mentor junior engineers and foster technical growth across the team.
• Collaborate with customers, stakeholders, and engineering teams to develop solutions that meet current and future business requirements.
• Participate in architecture reviews, capacity planning, disaster recovery planning, and continuous improvement initiatives.

Skills

Linux administration

SaltStack (Salt)

FreeIPA/IPA

Networking: TCP/IP, DNS, DHCP

Cisco & Juniper

Scripting: Bash / Python

Security/hardening

Troubleshooting complex systems

Infrastructure automation

Education

College degree

Tools

SaltStack

FreeIPA/IPA

Virtualization/VDI

Cisco IOS / Junos

Bash / Python scripting

Job description

L2T, LLC is a fast-growing, high-tech, mission-driven company based in Herndon, Virginia that prides itself on delivering technical and mission-related solutions that allow our customers to succeed in achieving their most challenging goals. We area close-knit team of highly motivated and skilled individuals that are focused on a commitmentto facing the most complex and difficult efforts head-on with a balance of creativity and discipline, and an unwavering nerve. Our Team embraces the concept that the sky's the limit. Regardless of where you are in your career, our goal is to work with you to refine your skills, add to your technical tool belt, and aid you in your growth as a professional. We offergrowth opportunitiessuch as leadership training, industry conferences, and mentorship from experienced, passionate individuals. Candidates must possess an active Top Secret clearance.

Responsibilities

• Design, implement, maintain, and optimize enterprise Linux systems and network infrastructure
• Architect and support scalable, secure, and highly available infrastructure solutions
• Lead automation initiatives using SaltStack and other infrastructure automation tools
• Serve as a senior technical resource and escalation point for complex production issues
• Perform advanced troubleshooting and root cause analysis across systems, networks, applications, and services
• Engineer and maintain Cisco and Juniper network environments to meet performance, security, and reliability requirements
• Administer and support identity management services, including FreeIPA/IPA
• Develop and maintain infrastructure standards, documentation, and operational procedures
• Evaluate emerging technologies and make recommendations for infrastructure improvements and modernization
• Ensure systems and networks meet or exceed security, compliance, and operational standards
• Mentor junior engineers and foster technical growth across the team
• Collaborate with customers, stakeholders, and engineering teams to develop solutions that meet current and future business requirements
• Participate in architecture reviews, capacity planning, disaster recovery planning, and continuous improvement initiatives

The ideal candidate is a hands-on senior engineer with deep Linux and networking expertise, strong automation skills, and a proven ability to solve complex infrastructure challenges. They possess a strong engineering mindset, thrive in highly technical environments, and are passionate about building reliable, scalable, and secure systems. Cloud experience is a plus but not required.

• - 10+ years of experience in Systems, Network, or Infrastructure Engineering
• Expert-level knowledge of Linux administration in enterprise or mission-critical environments
• Strong understanding of Linux internals, including system calls, processes, memory management, filesystems, and performance tuning
• Experience designing, implementing, and supporting complex enterprise infrastructure environments
• Hands-on experience with SaltStack (Salt) and infrastructure automation
• Experience administering identity and access management solutions, including FreeIPA/IPA
• Strong networking expertise, including: - - TCP/IP, DNS, DHCP, VLANs, VPNs
• - Routing and switching technologies
• - OSPF, BGP, policy-based routing, and network security
• - Cisco and Juniper network platforms
• Experience with virtualization technologies, hypervisors, and virtual desktop infrastructure (VDI)
• Strong scripting and automation skills using Bash, Python, or similar languages
• Experience developing and maintaining secure, hardened system and network configurations
• Demonstrated ability to troubleshoot complex issues across operating systems, network infrastructure, applications, and distributed systems
• Excellent written and verbal communication skills

Education

• A relevant college degree and/or practical experience, commensurate with the position you are seeking

Our Benefits

• 401(k) match of 6% with immediate vesting
• Highly subsidized Health, Dental, and Vision insurance
• Legal Resources Plan
• Vacation, personal/sick leave (not combined as Paid Time Off)
• 10 Federal Holidays
• Life insurance, short and long-term disability coverage paid by the company
• Free sodas and snacks
• Company sponsored weekly breakfast or lunch
• Awesome holiday parties and a fun family picnic
• Participation in several charitable events

Compensation

We believe in paying fairly and competitively based on the value each team member brings to the role. Individual compensation is determined by factors such as skills, experience, education, certifications, location, and market data. The anticipated salary range for this position is $140,000 – $180,000 annually.

We are proud to be an Equal Opportunity Employer and do not discriminate based on race, religion, gender, national origin, color, age, military service eligibility or veteran status, disability, sexual orientation, gender identity, maritalstatus, or any other protected class. We encourage and support workplace diversity.