Software Developer; GS

Fairmont, WV, United States | Posted on 02/13/2026

• Industry Technology - No Clearance Required
• Country United States

GST is seeking 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 has been approved for a hybrid work schedule but will 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 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.

As part of the application process, you are expected to be on camera during interviews and assessments. We reserve the right to take your picture to verify your identity and prevent fraud.

At GST, 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.

Salary at GST is determined by various factors, including but not limited to location, the individual's combination of education, knowledge, skills, competencies, and experience, as well as contract‑specific affordability and organizational requirements. The projected compensation range for this position is $85,000 to $105,000 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of the GST total compensation package for employees.

GST is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class.

GST provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans' Readjustment Assistance Act.

GTSC‑Talent Solutions 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.