Senior Network Engineer; GSPL

GTSC and its Global Sciences and Technology (GST) business unit seeks an experienced Senior Network Engineer to design, implement, secure, and support enterprise network infrastructure. This role requires deep technical expertise, strong troubleshooting skills, and the ability to lead network initiatives from planning through execution. The ideal candidate will have hands‑on experience with Sonic Wall firewalls and Cisco switches in complex, production environments.

This position is approved for a hybrid work schedule, with the requirement to work onsite at our Fairmont, WV office.

• Design, implement, and maintain reliable, secure, and scalable network infrastructure.
• Configure, manage, and troubleshoot Sonic Wall firewalls, including VPNs, security policies, and threat management.
• Install, configure, and support Cisco switches, including VLANs, routing, QoS, and switch stacking.
• Monitor network performance, availability, and security, proactively addressing issues.
• Lead network upgrades, migrations, and infrastructure improvement projects.
• Troubleshoot complex network issues across LAN, WAN, WLAN, and VPN environments.
• Collaborate with systems, security, and application teams to ensure network alignment with business needs.
• Create and maintain network documentation, diagrams, and standard operating procedures.
• Mentor junior engineers and provide technical leadership.
• Ensure compliance with security standards and best practices.
• Participate in on‑call rotation and provide after‑hours support as needed.

• Bachelor's degree in computer science or a related field of study.
• 7 or more years of hands‑on network engineering experience in enterprise environments.
• Proven experience with Sonic Wall firewalls (configuration, management, and troubleshooting).
• Strong experience with Cisco switches (Catalyst, Nexus, or similar).
• In‑depth knowledge of TCP/IP, DNS, DHCP, VLANs, routing protocols (OSPF, BGP preferred), and VPN technologies.
• Experience with network monitoring and diagnostic tools.
• Strong analytical, problem‑solving, and communication skills.
• Applicants selected will be subject to a government background investigation and may need to meet eligibility requirements.

BENEFITS - Employees working 30 hours weekly

We celebrate your contributions we will provide you with opportunities and choices and support your total well‑being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, work‑life programs, and dependent care for full‑time employees working 30‑plus hours per week. Our recognition awards program acknowledges employees for exceptional performance.

GTSC is an Equal Opportunity Employer and does not discriminate on the basis of race or ethnicity, religion, sex, national origin, age, veteran disability or genetic information or any other reason prohibited by law in employment. GTSC is committed to working with and providing reasonable accommodation to applicants with physical and mental disabilities. GTSC participates in the E‑Verify program in all locations as required by law.