Sr. Network Security Engineer - Top Secret Clearance (SCI Eligib

With more than twenty years of securing some of the U.S. Department of Defense and the Intelligence Community's most critical networks, JFL Consulting, LLC provides advanced network security solutions to a range of US Government and US commercial clients. Our cybersecurity operators are experts at assessing and defending mission-critical data and the networks that facilitate their operation. We are focused on delivering advanced products and industry best practices that meet each customer's unique requirements. Visit

Job Title: Senior Network Security Engineer
Primary Place of Performance: Washington, DC
Mandatory Requirements: U.S. Citizenship and TS/SCI Clearance

Experience Level: Senior Level (10+ Years)

JFL Consulting, LLC is seeking an experienced Senior Network Security Engineer to ensure the health, performance, and security of critical DoD network infrastructure. This role is responsible for the design, implementation, and support of enterprise networking solutions across LAN/WAN environments, software-defined networks, and secure communications systems. The Senior Network Engineer will provide technical leadership on projects, mentor junior engineers, and collaborate with cybersecurity and systems teams to deliver secure and resilient network capabilities that meet mission requirements.

Responsibilities

Network Design & Implementation

• Design, implement, maintain, and support enterprise network infrastructure.
• Lead LAN/WAN connectivity solutions including routers, switches, VPNs, firewalls, wireless access points, and telephony.
• Work on new network projects and initiatives, ensuring scalable and secure design.

Network Operations & Troubleshooting

• Monitor network health, availability, and bandwidth utilization.
• Troubleshoot and resolve complex network performance issues and outages.
• Conduct capacity planning to ensure infrastructure supports future requirements.

Maintenance & Upgrades

• Maintain and upgrade network hardware, software, firewalls, switches, routers, phones, and access points.
• Ensure software-defined network (SDN) environments are fully supported and optimized.
• Implement and document network infrastructure standards and procedures.

Security & Compliance

• Implement and enforce network security measures and best practices.
• Support compliance with DoD cybersecurity requirements and industry standards.

Leadership & Collaboration

• Provide mentorship and training to junior network engineers.
• Collaborate with system administrators, security engineers, and program managers to ensure integrated operations.

Additional Duties

• Stay current on the latest networking technologies and trends.
• Other responsibilities as assigned in support of mission success.

Requirements

Education

• Bachelor's degree in Information Technology, Computer Science, or a related engineering field preferred.
• Equivalent military or professional experience may be considered in lieu of a degree.

Certificates

• Minimum Required Certifications:
  • Cisco Certified Network Professional (CCNP)
  • DoD 8570 IAT II Certification (e.g., Security+, CISSP, GCIH, CySA+)
• Preferred Certifications:
  • Cisco Certified Internetwork Expert (CCIE)
  • Cisco Certified Design Expert (CCDE)
  • Juniper Networks Certified Internet Expert (JNCIE)

Experience

• 10+ years of experience as a Network Engineer with extensive Cisco and Juniper background.
• Demonstrated expertise in LAN/WAN, routing protocols (OSPF, BGP, EIGRP), QoS, and SDN.
• Prior experience supporting DoD or classified government environments is highly desired.

Technical Skills

• Expert-level knowledge of Cisco and Juniper IOS.
• Proficiency in routing/switching protocols (OSPF, BGP, EIGRP, QoS).
• Strong troubleshooting and diagnostic skills for complex networks.
• Familiarity with network monitoring and analysis tools.

Knowledge

• Working technical knowledge of network security tools and defensive tactics.
• Strong understanding of enterprise network architectures, performance tuning, and capacity planning.

Soft Skills

• Excellent problem-solving and critical-thinking abilities.
• Strong written and verbal communication skills, able to brief technical and executive stakeholders.
• Ability to mentor, lead, and collaborate effectively in cross-functional teams.
• Commitment to professional growth and staying current with emerging networking technologies.

Competitive Benefits Package Includes:

• 100% employer-paid medical, dental, and vision for employees and dependents
• 401(k) with 3% company contribution and immediate vesting
• Generous PTO policy (15 vacation, 5 sick, 2 personal days)
• Reimbursement for job-related certifications, generous training budget and company provided access to training platforms.

JFL Consulting, LLC is an Equal Opportunity Employer.

We do not discriminate against any applicant for employment on any legally recognized basis including, but not limited to: race, religion or creed, color, national origin, sex, age, disability, marital status, sexual orientation, genetic information, veteran status, status with regard to public assistance or any other protected class under federal, state or local statute. It is also the policy of JFL Consulting, LLC to provide reasonable accommodations for qualified individuals with disabilities.