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Cyber Security Engineer III

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: System One
Contract position
Listed on 2026-06-07
Job specializations:
  • IT/Tech
    Cybersecurity, Network Security
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Location: St. Louis

Job Title: Cyber Security Engineer

Location: St. Louis, MO

Work Model: Onsite

Position Type: 6 Month Contract to Hire

Clearance Requirement: Active TS/SCI required and ability to obtain poly

Job Summary

We are seeking a Cyber Security Engineer to support a mission critical NGA cybersecurity program in St. Louis, MO. This role will provide cyber threat intelligence, advanced cybersecurity analytics, security operations support, and incident response coordination across government systems and networks.

The Cyber Security Engineer will collect, analyze, and distribute threat intelligence from government sources, commercial feeds, open source reporting, and partner organizations to improve situational awareness of the cyber threat environment. This role will also support cybersecurity analytics, reporting, detection tuning, operational recommendations, and security monitoring activities for customer systems and networks.

This is a strong fit for someone with hands on cyber operations experience across HBSS, firewalls, IDS, IPS, VPNs, network security tools, threat intelligence, incident analysis, and cybersecurity reporting.

Key Responsibilities
  • Provide cyber threat intelligence support, including the collection, fusion, analysis, creation, and distribution of threat intelligence from government entities, commercial feeds, open sources, and partner organizations.
  • Develop and disseminate threat reports, tippers, and situational awareness products to internal and external stakeholders based on events, alerts, and incidents affecting customer systems and networks.
  • Perform advanced cybersecurity analytics by aggregating and analyzing security data, products, and information to identify trends, patterns, anomalous activity, and potential threats.
  • Provide operational recommendations, visualizations, tuning requests, and custom signature creation to the CSOC and other stakeholders.
  • Implement and monitor security measures for communication systems and networks while ensuring systems and personnel follow established security standards and government requirements.
  • Support network security activities involving HBSS, firewalls, Intrusion Detection Systems, Intrusion Prevention Systems, VPNs, and other point of presence security tools.
  • Conduct performance analysis of information systems security incidents and support security incident response activities.
  • Support Network Intrusion Detection and Forensics activities.
  • Assist with Continuity of Operations and Disaster Recovery planning.
  • Support certification activities for information systems and networks.
  • Provide cybersecurity services during core 12x5 support hours and participate in on call support with a two hour response requirement during non core hours.
  • Support Public Key Infrastructure, Electronic Key Management System operations, and other information security duties as needed.
  • Develop new concepts, processes, and solutions to improve cybersecurity operations.
  • Analyze root causes, resolve technical issues, and provide guidance to junior technicians and specialists.
  • Work individually, participate on integrated teams, and potentially lead tasks, projects, or small teams.
Required Qualifications
  • Active TS/SCI clearance.
  • U.S. Citizenship.
  • Bachelor’s degree in a technical field such as Information Technology, Information Systems, Computer Science, Cybersecurity, or a related discipline.
  • High School diploma or GED with 10 years of relevant cybersecurity experience.
  • Associate degree with 8 years of relevant cybersecurity experience.
  • Bachelor’s degree with 6 or more years of relevant cybersecurity experience.
  • Experience working in cybersecurity operations with tools and technologies such as HBSS, firewalls, Intrusion Prevention Systems, Intrusion Detection Systems, VPNs, and related security operations platforms.
  • Experience supporting cybersecurity monitoring, analysis, threat intelligence, incident response, or security operations center environments.
  • Ability to analyze cybersecurity events, alerts, incidents, and threat reporting to identify risks and provide actionable recommendations.
Preferred Qualifications
  • IAT Level III certification.
  • DoD 8140.01 and DoD 8570.01-M IAT Level III…
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