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Endpoint Security Engineer

Job in Springfield, Fairfax County, Virginia, 22161, USA
Listing for: Valiant Solutions, LLC
Full Time position
Listed on 2026-11-04
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 101400 - 144900 USD Yearly USD 101400.00 144900.00 YEAR
Job Description & How to Apply Below
Position Description

Valiant Solutions is seeking an Endpoint Security Engineer to join our rapidly growing and innovative team!

The Endpoint Security Engineer will join a program that provides network and Cybersecurity services supporting an Intelligence Community customer. The team will support transport and cybersecurity information technology (IT) services across multiple networks and security domains at multiple locations worldwide, including new facilities and building construction, to support the IC mission.

Named one of the Washington Business Journal’s
Best Places to Work
every year since 2014
, Valiant is proud of our employee-centric culture and commitment to excellence. If you are interested in learning more about Valiant and this opportunity,

Location: St. Louis, MO or Springfield, VA

Required Clearance: TS/SCI with the ability to obtain and maintain a CI Polygraph.

Required Education and

Certifications:

  • Bachelor’s degree in Engineering, Computer Science, or related field with 6 years of additional experience (additional experience may be considered in place of a degree).
  • Current DoD 8570 IAT Level II certification.
  • CSSP Infrastructure Support certification within 6 months of hire date.

Desired

Certifications:

  • CSSP Infrastructure Support certification at time of hire.
  • Linux-related certifications.

Required Skills:

  • 10 years of technical experience in cybersecurity.
  • Working knowledge of maintaining enterprise cybersecurity engineering requirements using some or all of the following tools:
    Trellix, HBSS, Carbon Black Response/Protection, Microsoft ATA, and Tanium.
  • Strong working knowledge of administering applications in a Linux environment.
  • Experience with large-scale enterprise/global networks in a fast-paced, diverse environment.
  • Understanding of and experience with the DoD Architecture Framework and other key DoD network architecture and strategic planning instructions.
  • Experience providing status reports and products to senior management and customers.
  • Experience planning, designing, and evaluating security systems and architectures

Desired

Skills:

  • Windows Enterprise Active Directory (AD) architecture.
  • VMware virtualization.

Responsibilities:

  • Implements and applies technologies, processes, and practices designed to protect networks, devices, programs, and data from malicious attack, damage, or unauthorized access.
  • Provides engineering and sustainment support for endpoint security solutions.
  • Establishes the computing environment by designing system configuration, directing system installation, and defining, documenting, and enforcing system standards.
  • Provides specific, detailed information on hardware and software selection, implementation techniques, and tools to meet business needs, including present and future capacity requirements.
  • Configures and installs security products using Linux OS.
  • Works with the software vendor and the customer to research, analyze, and implement enterprise-wide security solutions, capabilities, and enhancements to support customer business and mission goals.
  • Assists with design, analysis, testing, and implementation of secure architectures.
  • Oversees security infrastructure sustainment, maintenance, and advanced configuration, including policy management, database administration, and security management tools.
  • Oversees the reporting, documentation, and investigation of all security-related incidents and leads the development and implementation of corrective measures.

About Valiant Solutions

Valiant Solutions delivers cybersecurity and IT services to federal civilian, defense, and national security customers nationwide. We support the full cyber lifecycle, from secure system design and accreditation through AI-enabled operations, threat emulation, and continuous improvement, across classified and unclassified environments. Our work is independently certified for quality and security, including CMMI, CMMC, and ISO certifications.

Valiant is a multi-year Washington Business Journal Best Places to Work winner, and our growth and cyber leadership have been recognized by Washington Technology, Northern Virginia Technology Council, and the Triangle Business Journal. We offer strong benefits, rewards for earning industry certifications, and room to grow your career as we grow. Headquartered in McLean, Virginia, our distributed workforce supports customers from coast to coast.

We go where the stakes are highest, and the margin for error is zero. If you want meaningful work alongside talented professionals,

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