Network Engineer

JOHNSON SERVICE GROUP; Loch Lomond (VA); On-site; USD 85,000 - 120,000; Full time

Benefits offered by this job

Medical insurance

401(k)

Weekly pay

Job summary

Johnson Service Group is seeking a Network Engineer to support and optimize Cisco-based enterprise networks in a Manassas, VA data-center environment. On-site work is required with occasional remote discussions when conditions permit.

You will monitor, troubleshoot, and maintain Layer 2/3 switching, VLANs, routing, and related services, using SolarWinds Orion, while coordinating with multiple IT teams to ensure reliability and performance.

Qualifications

• 3–5+ years of hands-on enterprise networking experience.
• Strong experience with Cisco switches and enterprise network infrastructure.
• Solid understanding of Layer 2/3, VLANs, STP, and routing.
• Familiarity with OSPF and BGP, and network monitoring tools.
• Experience with incident, problem, and change-management processes.

Responsibilities

• Support and troubleshoot Cisco enterprise network infrastructure.
• Configure, maintain, and troubleshoot Layer 2 and Layer 3 switches.
• Monitor network performance using SolarWinds Orion.
• Maintain network diagrams, device inventories, and documentation.
• Coordinate with IT teams on incidents, changes, and deployments.
• Assist with network refreshes, equipment replacement, and projects.

Skills

Enterprise networking

Cisco switches

Troubleshooting

Incident/change management

Education

Bachelor’s degree in computer science or related field

CCNA/CCNP certification preferred

Security/CCIE a plus

Tools

SolarWinds Orion

Cisco IOS

Network monitoring tools

VPN/firewall management

Network documentation tools

Job description

Johnson Service Group is hiring for a NETWORK ENGINEER Location: Manassas, VA (20109) – on-site required. (On-site work at a data center as well as working from the designated office will be required.) Remote work possible when situation arises, or sites closed.

Key Responsibility

• Support and troubleshoot Cisco enterprise network infrastructure.
• Configure, maintain, and troubleshoot Layer 2 and Layer 3 switches.
• Support VLANs, trunking, STP, routing, ACLs, DHCP, DNS, and related network services.
• Monitor network devices, interfaces, links, and performance using SolarWinds Orion.
• Configure and maintain Orion alerts, thresholds, interface monitoring, and network availability monitoring.
• Investigate network alerts, outages, packet loss, latency, interface errors, and performance degradation.
• Perform switch configuration, firmware/software upgrades, backups, and routine network maintenance.
• Troubleshoot LAN/WAN connectivity and end‑user network issues.
• Support network changes through established change‑management processes.
• Maintain network diagrams, device inventories, configurations, and technical documentation.
• Assist with network refreshes, equipment replacement, deployments, and infrastructure projects.
• Coordinate with infrastructure, cybersecurity, service desk, vendors, and other technical teams as required.
• Respond to operational incidents and participate in troubleshooting and root‑cause analysis.
• Ensure assigned tasks and incidents are completed independently with appropriate documentation and follow‑through.

Required Qualifications

• 3–5+ years of hands‑on enterprise networking experience.
• Strong experience with Cisco switches and enterprise network infrastructure.
• Solid understanding of Layer 2 and Layer 3 networking.
• Experience with VLANs, STP/RSTP, trunking, EtherChannel, TCP/IP, subnetting, and routing.
• Working knowledge of routing protocols such as OSPF and BGP.
• Hands‑on experience with SolarWinds Orion or a comparable network monitoring platform.
• Strong network troubleshooting and diagnostic skills.
• Experience working within incident, problem, and change‑management processes.
• Ability to independently manage assigned work and troubleshoot issues through resolution.

Preferred Qualifications

• CCNA or CCNP certification.
• Experience supporting Cisco Catalyst switching environments.
• Experience with firewalls, wireless networking, VPNs, and WAN technologies.
• Familiarity with SolarWinds NPM/NCM and network configuration management.
• Experience supporting highly available or critical infrastructure environments.
• Familiarity with cybersecurity practices, network segmentation, and access controls.
• CISCO Next-generation Firewall (NGFW)

Education Requirements

• Bachelor’s degree in computer science, computer networks, or a related field.
• Certification in related fields (CCNA, CCNP) required.
• Security and Cisco Certified Internetwork Expert (CCIE), a plus.

Additional Information

• JSG offers medical, dental, vision, life insurance options, short-term disability, 401(k), weekly pay, and more.

Johnson Service Group (JSG) is an Equal Opportunity Employer.

JSG provides equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, disability, marital status, protected veteran status, or any other characteristic protected by law.