Network Security Engineer III - HHS STIM

Remote
Full Time
HHS STIM
Experienced

Job Description: Network Security Engineer III

Key Responsibilities

  • Administer, configure, manage, and troubleshoot enterprise-wide network visibility and security tools such as firewalls, intrusion detection/prevention systems (IDS/IPS), packet capture tools, cybersecurity monitoring tools, and virtual private networks (VPNs).
  • Deploy, manage, and troubleshoot LAN, MAN, WAN, VPN, and wireless network environments across HHS enterprise systems.
  • Detect, analyze, and mitigate advanced threats including Command-and-Control (C&C) attacks, ransomware, Distributed-Denial-of-Service (DDoS), illicit cryptomining, unknown malware, and insider threats.
  • Administer, configure, and support Gigamon GigaVUE appliances, Cisco Secure Network Analytics (formerly Stealthwatch), and other department-wide network analytics tools.
  • Provide customer-facing support through collaborative troubleshooting with multiple stakeholders and vendors, addressing issues ranging from basic inquiries to critical outages.
  • Support on-call rotations to provide Subject Matter Expert (SME) support for multi-OS environments.
  • Respond to network security incidents, take containment and remediation actions, and support continuous improvement of detection and prevention processes.
  • Stay current with emerging threats, vulnerabilities, and network security best practices to proactively strengthen the HHS security posture.
  • Maintain and develop documentation for system designs, configurations, processes, and service records.
  • Collaborate with IT staff and stakeholders across disciplines to ensure overall security of HHS enterprise networks.
  • Mentor and lead junior engineers, providing guidance on best practices and resolving technical challenges.

Required Qualifications

  • Bachelor’s degree in Computer Science, Information Security, Information Technology, or related discipline, or equivalent combination of education, certifications, and professional experience【38†source】.
  • At least 5 years of professional experience with enterprise-wide network visibility and/or network security tools.
  • Demonstrated experience with deployment, management, and troubleshooting of LAN, MAN, WAN, VPN, and wireless networks.
  • Proficiency with enterprise security tools such as Gigamon, Cisco Secure Network Analytics (Stealthwatch), IDS/IPS, firewalls, and packet capture solutions.
  • Hands-on experience detecting, analyzing, and mitigating cyber threats such as ransomware, DDoS, malware, insider threats, and C&C activities.
  • Experience in incident response, security monitoring, and remediation activities.
  • Strong problem-solving, documentation, and communication skills, with the ability to explain complex technical concepts to non-technical stakeholders.
  • Demonstrated ability to work independently and as part of a team, with excellent organizational skills.
  • Familiarity with security frameworks and hardening standards including CIS Controls, NIST SP 800-53 Rev. 5, and DISA STIGs【38†source】.
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