Cyber Defense/Network Security Engineer

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)