Security Onion

Security Onion Engineer Jobs

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Today

Cyber Defense/Network Security Engineer

JFL Consulting LLC Springfield, VA

Springfield, VA

Today

$155k - $175k/yr Full time Cloud Platforms Computer Network Defense Cyber Defense

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Job Description

JFL Consulting LLC offers an onsite role supporting secure government environments with hands-on infrastructure and security operations. Enjoy competitive pay and a comprehensive benefits package, including 100% employer-paid medical, dental, and vision premiums for employees and dependents, employer-matched 401(k) contributions with immediate vesting, and paid time off across vacation, sick, personal days, and holidays. You will also receive certification reimbursement and dedicated professional development funding with access to company-provided online learning platforms.

Location: Springfield, VA (onsite)
Salary: USD 155,000 - 175,000 per year
Clearance: TS/SCI required
Experience: 5+ years

Responsibilities

Perform on-site configuration of servers, storage, and networking hardware in secure environments
Install, cable, and maintain rack-mounted hardware, including power and cooling components
Deploy, configure, and support infrastructure for Linux and Windows systems
Build and administer virtualized environments using Proxmox, VMware ESXi, and Hyper-V
Apply system hardening, OS patching, logging, and backup strategies across physical and virtual systems
Implement network monitoring using SPAN ports and Gigamon taps
Ensure infrastructure aligns with DoD cybersecurity frameworks, including RMF and STIGs
Automate configuration tasks and infrastructure deployments using Bash, Python, or PowerShell
Operate and maintain security platforms: Security Onion, Zeek, Suricata, Wazuh, Splunk, Elastic Stack
Conduct vulnerability scans and implement security remediation in support of STIGs and RMF
Monitor system health, identify performance or security issues, and execute timely remediation
Support incident response, security audits, and continuous compliance efforts
Develop and maintain technical documentation such as SOPs, network/system diagrams, and baselines
Present technical recommendations to stakeholders with varying technical expertise
Contribute to compliance reporting and audit readiness through accurate documentation

Requirements

TS/SCI Clearance
DoD 8140/8570 IAT Level II certification (examples: Security+, GCIH, CYSA+)
5+ years in a systems engineering or infrastructure role
Experience with Active Directory, DNS, SSO, and authentication protocols
Hands-on experience with virtualization platforms (ESXi, Hyper-V, or Proxmox)
Experience with cloud platforms (AWS, Azure, or GCP) is desirable
Advanced knowledge of Linux and Microsoft environments
Strong scripting skills in Python, Bash, or PowerShell
Networking fundamentals including VLANs, routing, NAT, subnetting
Familiarity with configuration management tools (examples: Ansible, Puppet)
Understanding of cybersecurity fundamentals, system hardening, and monitoring practices
Strong written and verbal communication skills
Ability to produce clear technical documentation and reports
Bachelor’s or Master’s degree in a related field preferred
Systems engineering certifications (examples: Microsoft, Red Hat, VMware, CompTIA Advanced credentials)

Technologies

Linux, Windows
Proxmox, VMware ESXi, Hyper-V
Bash, Python, PowerShell
Security Onion, Zeek, Suricata, Wazuh, Splunk, Elastic Stack
SPAN ports, Gigamon taps
RMF, STIGs
Active Directory, DNS, SSO
VLANs, routing, NAT, subnetting
Ansible, Puppet
AWS, Azure, GCP

Benefits

Salary: $155k- $175k
100% employer-paid medical, dental, and vision premiums for employees and dependents
Flexible Spending Accounts (healthcare, dependent care, and commuter)
Life insurance, short-term disability, and long-term disability
401(k) with immediate vesting of company contribution
Generous PTO policy: 15 vacation, 5 sick, 2 personal days, 11 holidays
Certification reimbursement, dedicated professional development funding, and company-provided access to online learning platforms

Travel

Up to 10-20% (CONUS & OCONUS)

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2mo ago

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This position is no longer accepting applications (closed Aug 31, 2026).