Cyber Security Engineer III
St. Louis, Missouri
Experience: 0
Category: Information Technology
Contractor Work Model: Onsite
Brand: System One
Compensation Range: 135000.00 Per Hour
Job ID: 351833
Date Posted: 06/04/2026
Shortcut: http://jobs.systemone.com/wH1bIm
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.
Equivalent experience may be considered as follows:
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 certification.
CSSP Analyst certification.
Ability to obtain required DoD 8140 / 8570 certifications within 6 months of starting if not already held.
Master’s degree in a technical field.
TS/SCI with Polygraph.
Experience supporting NGA, DoD, intelligence community, or mission critical federal cybersecurity environments.
Experience creating cyber threat reports, tippers, custom signatures, tuning recommendations, or operational threat intelligence products.
System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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