Network Engineer

Markon

. Full lifecycle management of network infrastructure, including design, deployment, and ongoing maintenance.

Posted 4/21/2026full-timeReston • Virginia • 🇺🇸 United StatesSeniorLead💰 $170,000 - $220,000 per yearWebsite

Tech Stack

Tools & technologies

CitrixFirewallsSplunkTypeScript

About the role

Key responsibilities & impact

Full lifecycle management of network infrastructure, including design, deployment, and ongoing maintenance.
Scale and implement internally developed solutions, with a focus on performance monitoring and troubleshooting to ensure network reliability and efficiency.

Requirements

What you’ll need

Active TS/SCI with Full Scope Polygraph (preferably from this client).
Minimum of sixteen (16) years of experience specific to developing Datacenter, LAN, WAN, and Client Access network architectures and networks/systems.
Bachelor's Degree related to specific skill from an accredited college or university OR: Associates and eighteen (18) years of related work experience.
No degree and twenty (20) years related work experience.
Experience with testing, integrating and deploying systems and ability to perform full lifecycle system management.
Experience with developing Datacenter, LAN/WAN, and customer network architecture and networks or systems.
Minimum of 3 years of experience with Cisco Firepower Management, Cisco Application Centric Infrastructure (ACI) networks, Firewalls and VPN Concentrators (FTD and ASA), Cisco Datacenter, LAN/WAN, Client Access technologies, i.e. MACsec, HSRP, VRF, VPC, ACLs, BGP, EIGRP.
Understanding of high availability technologies and implementation and development concepts.
Experience with technical validation of network designs, network monitoring, and incorporate best practices.
Must have strong analytical and problem-solving skills with complex situations.
Demonstrate excellent communication and interpersonal skills, both oral and written, as well as working autonomously and as part of a collaborative team environment.
Maintain relevant technical training to remain current with evolving technology landscape.
Experience with building, deploying and maintaining the Nutanix hypervisor platform, Palo Alto Firewalls via Panorama, and Citrix Application Delivery Controllers.
Experience with SIEM and security analytical technologies (e.g.: Splunk, pcap, Netflow, Solarwinds, etc.)

Benefits

Comp & perks

Medical
Dental
Vision
Life Insurance
Short-Term Disability
Long-Term Disability
401(k) match
Flexible Spending Accounts
EAP
Training and Tuition Assistance
Paid Time Off
Holidays

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

network infrastructure managementperformance monitoringtroubleshootingDatacenter architectureLAN architectureWAN architectureCisco Firepower ManagementCisco ACInetwork design validationhigh availability technologies

Soft Skills

analytical skillsproblem-solving skillscommunication skillsinterpersonal skillscollaborative teamworkautonomous work

Certifications

Active TS/SCI with Full Scope Polygraph