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Network Engineer SME Security Clearance

Job in Alexandria, Fairfax County, Virginia, 22350, USA
Listing for: System One Holdings, LLC
Full Time position
Listed on 2026-03-04
Job specializations:
  • Engineering
    Cybersecurity, Systems Engineer
Job Description & How to Apply Below
Position: Network Engineer SME with Security Clearance
Network Engineer SME
Franconia / Alexandria, VA - onsite
Must have at least an interim Secret Clearance The Network Engineer SME will be responsible for ensuring the stable operation and efficient performance of data networks; monitoring and managing all network hardware and equipment, including routers, switches, and encryptors; analyzing network performance across the organization’s LANs and WANs; and identifying and developing remedies for network performance bottlenecks. The Network Engineer SME shall have a solid working knowledge of network security measures, experience with network management and analysis tools.

Responsibilities:

• Design, implement, and maintain robust network infrastructures, including LAN, WAN, and VPNs.

• Monitor network traffic and performance, troubleshoot connectivity issues, and optimize network resources to minimize downtime.

• Implement and manage security measures, such as firewalls, access controls, and intrusion prevention systems.

• Inspect, maintain, and, where necessary, replace network cabling and other network-related equipment.

• Administer hardware and software upgrades for network equipment.

• Create and maintain detailed network documentation, including network topology, IP schemas, and firewall rules.

• Develop, implement, and maintain policies, procedures and associated training plans for network resource administration, appropriate use and disaster recovery.

• Perform network asset management, including maintenance of network component inventory and related documentation and technical specifications information.

• Administer and maintain user accounts, permissions, and access rights.

• Recommend, schedule, and perform network improvements, upgrades, and repairs.

• Interact with vendors, outsource rs, and contractors to secure network products and services.

• Design, configure, troubleshoot, and expand IP address schemas for a WAN/LAN network

• Develop functional, systems, and technical requirements documents based on operational and architectural requirements.

• Perform technical analysis of IT alternatives in support of strategic modernization efforts.

• Provide expert analysis and advice on the feasibility of system designs.

• Perform detailed engineering to optimize enterprise network topologies and develop engineering design documentation to produce, install, test, integrate, and support a complete functional enterprise or processing system or subsystem.

• Provide technical support and quality control checks to ensure information systems designs and specifications meet the necessary standards.

• Troubleshoot and analyze network and communication issue and assist in their resolution.

• Perform firmware upgrades, apply patches, and conduct routine maintenance to keep network systems up to date.

• Work with other IT teams, such as security, system administrators, and applications, to ensure integrated network operations.

• Setup and configure Juniper network devices like MX series routers, SRX firewalls and QFX switches.

• The ideal candidate would also perform:
o Serve as the network team lead and subject matter expert for technical and resource management. Act as a conduit for communication between Network Administrators and the senior leadership and/or technical staff.
o Manage the daily activities of the network team - act on any technical faults or issues, maintain the on-call schedule, and ensure documentation is complete.
o Under the direction of the senior leadership, initiate, plan, delegate, execute, monitor, and complete projects.

Qualifications:

Key Technical

Skills:

• Must have 7+ years of Network Engineering experience.

• Must obtain a Juniper cert within 6 months of employment.

• Protocols: strong understating of TCP/IP, DNS, DHCP, BGP, and OSPF.

• Security Tools:

Experience with firewalls, Intrusion Detection Systems (IDS), and Intrusion Prevention Systems (IPS).

• Strong communication and written skills.

Preferred Qualifications:

• A degree in the field of computer science or other IT related discipline is preferred.



Certifications:

Juniper Networks Certified Specialist:
Enterprise Routing and Switching (JNCIS-ENT), Juniper Network Certified Internet Expert (JNCIE) OR the Cisco equivalent Cisco Certified Network Professional (CCNP), Cisco Certified Internet Expert (CCIE)

• Juniper Hardware & Software:
Proficiency with Juniper routers (MX), switches (EX), and firewalls (SRX).
• Junos OS:
Knowledge of Juniper’s operating system for network device management
• At least two years' experience supervising small technical teams comprised of at least 6 staff members
• Experience with Juniper network solutions is preferred.
• Minimum Interim Secret clearance with upgrade to Top Secret
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