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Endpoint Security Engineer

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: Cybersecurity Jobs
Full Time position
Listed on 2026-10-04
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 101000 - 111000 USD Yearly USD 101000.00 111000.00 YEAR
Job Description & How to Apply Below

RISA is seeking a Senior Endpoint Security Engineer to engineer and sustain enterprise endpoint security platforms for an Intelligence Community customer. In this onsite role in St. Louis, MO
, you will design, configure, install, and maintain endpoint security capabilities using tools such as Trellix (HBSS),
Tanium
, and Carbon Black
.

The position also emphasizes operational readiness through sustainment, policy management, incident reporting, and follow-on corrective actions. You will collaborate with vendors and the customer to research, analyze, and implement enterprise-wide improvements and to help shape secure architectures aligned with DoD guidance.

What you'll do
  • Provide engineering and sustainment support for enterprise endpoint security solutions.
  • Design endpoint security configurations, perform direct installations, and define, document, and enforce system standards.
  • Configure and install security products on Linux
    .
  • Partner with vendors and the customer to research, analyze, and implement enterprise-wide security capabilities.
  • Recommend hardware, software, and implementation approaches sized for current and future capacity.
  • Support the design, analysis, testing, and implementation of secure architectures.
  • Oversee sustainment and advanced configuration, including policy management
    , database administration
    , and security management tools
    .
  • Lead reporting, documentation, and investigation of security incidents, including corrective measures.
What you bring
  • U.S. citizenship and an active TS/SCI
    .
  • Ability to obtain and maintain a Government polygraph after hire.
  • Bachelor's degree in Engineering, Computer Science, or a related field, plus 10 years of technical experience in cybersecurity (additional experience may be considered in lieu of a degree).
  • Current DoD 8140.01 / 8570.01-M
    IAT Level II certification, and CSSP Infrastructure Support within 6 months of hire.
  • Working knowledge of enterprise endpoint security tools, including HBSS (Trellix),
    Carbon Black Response/Protection
    , Microsoft ATA
    , and Tanium (all or some).
  • Strong working knowledge of administering applications in a Linux environment.
  • Experience on large-scale enterprise or global networks in a high-paced, diverse environment.
  • Experience aligned to DoD Architecture Framework and related DoD network architecture and strategic planning instructions.
  • Experience planning, designing, and evaluating security systems and architectures, including reporting to senior management and customers.
Tools and technologies
  • Trellix (HBSS)
  • Tanium
  • Carbon Black Response/Protection
  • Microsoft ATA
  • Linux
  • DoD Architecture Framework
Benefits and work details
  • Medical, dental, and vision insurance
  • 401(k) and Roth
  • Paid Time Off
  • 11 paid Federal Holidays
  • Location: St. Louis, MO (onsite)
  • Employment type: Full time, Exempt
  • Clearance required to start: Active TS/SCI (U.S. citizenship required)
  • Travel: Up to 10% (local)
  • Salary range: $101,000 - $111,000 per year
Nice to have
  • CSSP Infrastructure Support certification already in hand
  • Linux certifications
  • Windows enterprise Active Directory architecture and VMware virtualization
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