Sr. Information Security Engineer

Adaptivestack Technologies is seeking a proactive and detail-oriented Sr. Network Information Security Engineer to support federal enterprise cybersecurity operations. This role will be responsible for securing network infrastructure for the National Institutes of Health (NIH) Center for Information Technology (CIT), helping to ensure confidentiality, integrity, and availability of critical systems and services supporting over 45,000 users. This position demands hands-on expertise in network security engineering, monitoring, vulnerability management, compliance reporting, and collaboration with multiple stakeholders in a FISMA High environment. Candidates must have a strong working knowledge of NIST cybersecurity standards, federal IT risk management practices, and enterprise network architectures. Key Responsibilities • Implement and maintain network security solutions, including firewalls (Cisco ASA, Palo Alto), intrusion prevention systems (IPS), VPNs, DNS security, NAC, and load balancers. • Monitor system logs, alerts, and telemetry data to detect anomalies, investigate incidents, and support security event triage and response. • Conduct vulnerability assessments, analyze findings, and assist in remediation planning and execution. • Manage and maintain system and security baselines, ensuring secure configurations for network appliances and infrastructure per NIH and NIST guidelines. • Support and maintain security tools such as Splunk, Tenable Nessus, Cisco ISE, Algosec, ScienceLogic SL1, Grafana, and more. • Participate in the development and maintenance of: • Security Assessment & Authorization (SA&A) documentation • System Security Plans (SSPs) • Plans of Action and Milestones (POA&Ms) • Interconnection Security Agreements (ISAs) • Assist with audits, security reviews, and compliance reporting to NIH stakeholders. • Collaborate with the CIT CISO, Information Security Program (ISP), and infrastructure teams to implement and enforce NIH cybersecurity policies and controls. • Provide after-hours and on-call support during critical events, patch cycles, or continuity operations. Required Qualifications • Bachelor’s degree in Cybersecurity, Information Systems, or related field (or equivalent experience) • 4+ years of experience in network security engineering in a federal, enterprise, or critical infrastructure environment • Experience with enterprise network security tools (e.g., Cisco ASA/Firepower, Palo Alto, IDS/IPS, VPN, NAC) • Working knowledge of federal compliance frameworks including FISMA, NIST 800-53, and 800-37 • Experience with vulnerability management, incident response, and change control • Strong troubleshooting and documentation skills Preferred Qualifications • Experience supporting NIH, HHS, or other federal health agencies • Familiarity with cloud-based security tools and hybrid environments (e.g., AWS GovCloud, Azure Government) • Certifications such as: • CISSP, CEH, GSEC, Security+, or Cisco CCNP Security • Experience working in Trusted Internet Connection (TIC) environments • Exposure to Zero Trust Architecture principles and implementations Why Join Adaptivestack Technologies? At Adaptivestack Technologies, we empower federal missions with agile, secure IT services rooted in innovation and community impact. As a WOSB and HUBZone-certified firm, we value technical excellence, collaboration, and diversity. We offer: • Competitive salary and comprehensive benefits • Long-term, mission-critical projects supporting national health and science initiatives • Career development and mentorship • A culture that values your expertise and impact Job Type: Full-time Pay: $110,000.00 - $115,000.00 per year Benefits • 401(k) • Dental insurance • Health insurance Education: • Bachelor's (Preferred) Work Location: In person