Onsite Network Security Analyst – Firewall & Monitoring

CornerStone Technology Talent Services; Columbia (SC); On-site; USD 80,000 - 120,000; Full time

Job summary

CornerStone Technology Talent Services is seeking a Network Security Analyst to support enterprise cybersecurity operations and infrastructure protection in Columbia, South Carolina. This hands‑on role emphasizes firewall administration, threat monitoring, and incident response in an enterprise setting.

The ideal candidate will have about 3–5 years of networking experience, strong IT security or systems administration skills, and a background in securing complex networks.

Qualifications

• Approximately 3–5 years of hands‑on experience in network design, implementation, administration, or technical support.
• Practical experience in network security, IT security, or systems administration.
• Strong understanding of enterprise networking concepts, including routing, switching, TCP/IP, and secure network design.

Responsibilities

• Monitor, investigate, and respond to network security alerts, suspicious activity, and potential cybersecurity threats.
• Analyze network traffic, firewall logs, and security telemetry to identify vulnerabilities, policy violations, and unusual activity.
• Conduct security assessments for proposed firewall changes, network connectivity requests, and infrastructure modifications.
• Review firewall rules, website blocking requests, and network access changes to evaluate potential security risks.
• Support enterprise firewall management, ruleset reviews, recertification, and security auditing.
• Assist with the implementation, maintenance, and improvement of network security controls.
• Monitor on‑premises and cloud environments for emerging threats, vulnerabilities, and configuration issues.
• Work with IDS/IPS and other network security monitoring technologies.
• Support vulnerability scanning, risk assessments, and remediation activities.
• Collaborate with infrastructure, security, and business teams to troubleshoot network security issues and implement improvements.
• Assist with network security planning, architecture reviews, and infrastructure enhancement initiatives.
• Support cybersecurity compliance requirements involving NIST, HIPAA, and other applicable security frameworks.
• Develop and review security reports, operational metrics, and KPIs.
• Provide technical recommendations and contribute to ongoing SOC activities.
• Maintain accurate technical documentation and security assessment records.

Skills

Network security

Firewall administration

Routing & switching

Threat monitoring

IDS/IPS

Security auditing

Windows/macOS/Linux

CCNA

PCNSE

Education

Bachelor's degree in Computer Science / Information Systems / Cybersecurity

Job description

CornerStone Technology Talent Services is seeking a Network Security Analyst to support enterprise cybersecurity operations and infrastructure protection in Columbia, South Carolina. This hands‑on role emphasizes firewall administration, threat monitoring, and incident response in an enterprise setting.

The ideal candidate will have about 3–5 years of networking experience, strong IT security or systems administration skills, and a background in securing complex networks.