System Engineer 3

FLASH Technology Group; Fort Meade, Northern (MD, KY); On-site; USD 184,000 - 202,000; Full time

Benefits offered by this job

401(k) match

Medical Insurance

Dental Insurance

Vision Insurance

Life and Disability Insurance

Identity Theft Protection

Tuition Reimbursement

Paid Time Off

Referral bonuses

Job summary

Flash Technology Group is seeking a Systems Engineer 3 to lead the end-to-end engineering and deployment of Microsoft Defender for Endpoint and Trellix HX across hybrid environments, including on-premises, cloud, and VDI. The role requires TS/SCI with Polygraph, for a critical national security program.

You will collaborate with threat intelligence, author advanced IOCs with KQL and YARA, and act as a principal advisor to government stakeholders while mentoring junior engineers in a fast-paced,

Qualifications

• MDE architecture and deployment experience (MECM/SCCM or Intune).
• Trellix HX controllers/agents experience in restricted networks and rule creation (OpenIOC, YARA).
• Windows, Linux, macOS internals and forensics knowledge.
• IAM Level II or III baseline certifications held.

Responsibilities

• Lead lifecycle engineering and scale-out architecture of MDE and Trellix HX across hybrid environments.
• Tune agent configurations and exclusion policies to minimize mission friction; monitor endpoint health at scale.
• Advise government stakeholders on system risks and engineering considerations; mentor junior staff.

Skills

MDE Architecture

Trellix HX

OS Forensics

IAM Baseline (II/III)

Education

IAM Level II/III baseline certifications

Tools

MECM/SCCM or Intune

Kusto Query Language (KQL)

YARA rules

Job description

Are you ready to make a meaningful impact with a company that values your technical ambition?

Join us and experience a company where your contributions truly make a difference!

SYSTEM Engineer 3! Active TS/SCI with Polygraph required

Must be a US Citizen.

The Senior Systems Engineer (Level 3) serves as a principal technical leader and subject matter expert within the National Security Agency’s Enterprise Endpoint Detection and Response (EDR) Program. Operating in a highly classified, multi-domain infrastructure, the successful candidate will drive the strategic architectural design, end-to-end integration, deployment, and optimization of premier endpoint security platforms, specifically Microsoft Defender for Endpoint (MDE) and Trellix HX. This critical role bridges high-level systems architecture with operational defense capabilities, ensuring total endpoint visibility, robust threat containment, and resilient configuration management across all enterprise and mission-critical assets to defend national security infrastructure against sophisticated cyber threats.

Essential Duties and Responsibilities

• The Systems Engineer 3 is responsible for leading the lifecycle engineering and scale-out architecture of MDE and Trellix HX across hybrid environments, including on-premises, cloud, and virtual desktop infrastructures (VDI).
• This includes authoring complex system engineering and implementation plans, tuning agent configurations and exclusion policies to eliminate mission friction, and monitoring overall endpoint health at scale.
• The engineer will collaborate closely with threat hunting and intelligence analysts to translate actionable threat intelligence into custom technical indicators of compromise (IOCs), utilizing Kusto Query Language (KQL) and YARA rules.
• Additionally, the individual will act as a primary technical advisor to Government stakeholders on system risks and engineering considerations, provide advanced forensic support to the SOC during critical high-priority incidents, and actively mentor junior and mid-level engineering personnel within the program.

Required

• Microsoft Defender for Endpoint (MDE) Expertise: Proven engineering experience with MDE architecture, deployment strategies via MECM/SCCM or Intune, policy ring management, and advanced hunting using Kusto Query Language (KQL).
• Trellix HX Expertise: Demonstrated experience engineering, deploying, and managing Trellix HX (formerly FireEye) controllers and agents within air-gapped or highly restricted networks, including the creation of OpenIOC and YARA rules.
• Operating System & Forensic Knowledge: In-depth technical understanding of Windows, Linux, and macOS internals, including file systems, registry structures, and process execution mechanics.
• IAM Level II or III baseline certifications.

Desired

• Vendor Certifications: Microsoft Certified: Security Operations Analyst Associate (SC-200), Azure Security Engineer Associate (AZ-500), or Trellix Certified Engineering credentials.
• Methodologies & Toolsets: Experience with Model-Based Systems Engineering (MBSE), Cameo, and workflow management within the Atlassian Suite (Jira, Confluence).
• Technical Frameworks: Familiarity with NSA Technical Manual Standards (e.g., NSA DS-89) and defense-in-depth engineering principles.
• Core Competencies: Strong record of team collaboration, exceptional transparency in managing high-consequence infrastructure, and an aptitude for

Salary varies based on Years of experience: $184,000-$202,300

A variety of factors can impact the final salary offered, including, but not limited to, geographic location, Federal Government contract labor categories and wage rates, relevant work experience, specialized skills and competencies, education, and certifications.

Benefits

• 401(k) with 6% company match - VESTS IMMEDIATELY
• Medical Insurance
• Dental Insurance
• Vision Insurance
• Life and Disability Insurance
• Complimentary Identity Theft Protection
• Tuition Reimbursement
• Paid Time Off
• Referral bonuses
• And more!

At Flash Technology Group, we truly care about our team, offering flexibility for a balanced life, competitive compensation, and a robust benefits package that supports you and your family. We prioritize well-being with premium healthcare, financial and family support, retirement planning, and ongoing learning. We’re committed to your growth and happiness!

Flash Technology Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, age, national origin, disability, protected veteran status, or any other protected characteristic.