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SIEM ANALYST

Job in Herndon, Fairfax County, Virginia, 22070, USA
Listing for: Peraton
Full Time position
Listed on 2026-06-12
Job specializations:
  • IT/Tech
    Cybersecurity
  • Engineering
    Cybersecurity
Salary/Wage Range or Industry Benchmark: 85000 - 100000 USD Yearly USD 85000.00 100000.00 YEAR
Job Description & How to Apply Below

Qualifications

  • 2 years with BS/BA; 0 years with MS/MA; 6 years with no degree
  • Clearance:
    Active TS/SCI clearance.
  • Candidate must meet ONE of the following:
    • Bachelor’s degree in Cybersecurity; OR
    • Relevant professional certification or equivalent experience (examples: CySA+; GCIA; CEH); OR
    • Relevant DoD/military training (example: Splunk Core Certified Power User).
  • Required experience and skills:
    • SIEM, SOC, or security analytics experience with hands‑on alert investigation and correlation responsibilities.
    • Proficiency writing and tuning correlation logic/queries in one or more SIEM platforms (e.g., Splunk, Elastic, QRadar, Sentinel) and working knowledge of log formats/normalization.
    • Experience with endpoint telemetry, network flows, authentication logs, cloud logs, and threat‑intelligence enrichment.
    • Strong incident documentation, analytic writing, and case management skills; ability to produce reproducible investigation artifacts.
    • Capability to identify and remediate data‑quality and ingestion issues in coordination with data engineering teams.
  • Desired:
    • Prior DoD/ARNG SOC or classified‑environment SIEM experience.
    • Familiarity with MITRE ATT&CK mapping for detection use cases, SOAR integrations, and detection performance metrics (precision/recall, MTTD).
    • Experience mentoring junior analysts and contributing to a detection engineering backlog.

We are seeking a highly skilled and innovative SIEM Analyst to join our team in the greater DMV area, supporting the Army National Guard.

Responsibilities
  • Review complex SIEM events, logs, and alerts; correlate telemetry from network, endpoint, identity, and cloud sources to detect anomalous activity.
  • Investigate incidents through multi‑source correlation, timeline reconstruction, enrichment with threat intelligence, and IOC validation.
  • Build and update intermediate‑level correlation rules, alert logic, and detection filters to address evolving use cases and improve fidelity.
  • Document triage results, maintain investigation records with analytic notes, and categorize incidents per escalation criteria.
  • Support tuning by identifying systemic false positives, refining rule parameters, and proposing detection enhancements.
  • Collaborate with SOC analysts, threat hunters, cybersecurity engineers, and incident responders to provide technical context and preliminary root‑cause assessments.
  • Maintain SIEM dashboards and operational reporting: update visualizations, refine queries, and validate metric accuracy.
  • Verify ingestion, parsing, and normalization of log sources; perform data‑quality checks and report visibility gaps for remediation.
  • Apply detection playbooks and organizational policies to sustain continuous monitoring across all enclaves.
  • Contribute to SIEM operations improvement by refining analytic workflows, updating documentation, and adopting new platform capabilities.
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