About The Position

Sentar is seeking a Tier II Cyber Defense Incident Responder to provide 24/7/365 cybersecurity monitoring and detection for a government enterprise network in Quantico, Virginia. The role involves conducting in-depth cyber investigations and responding to incidents across the enterprise network, using advanced tools and engaging with global stakeholders to help ensure network security and operational integrity. This is a fast-paced role in a mission-critical environment. The position requires a Secret clearance, which will be upgraded to TS/SCI. The stated schedule includes overnight shifts from 7 p.m. to 7 a.m.: Sunday evening/Monday morning, Monday evening/Tuesday morning, Tuesday evening/Wednesday morning, and alternating Saturday evening/Sunday morning.

Requirements

  • High school diploma or equivalency certificate.
  • At least 2 years of experience in cybersecurity, with hands-on experience in incident response or related roles.
  • Secret security clearance; the clearance will be upgraded to TS/SCI.
  • Familiarity with Tanium, Elastic/Kibana, and Microsoft Defender for Endpoint.
  • Strong understanding of the DoD environment and cybersecurity frameworks.
  • Expertise in forensic analysis, threat hunting, and vulnerability assessment.
  • Strong problem-solving abilities and attention to detail.
  • Strong communication skills for interacting with technical teams, leadership, and external stakeholders.

Responsibilities

  • Provide 24/7/365 cybersecurity monitoring and detection for a government enterprise network.
  • Conduct in-depth cyber investigations.
  • Respond to incidents across the enterprise network.
  • Engage with global stakeholders to support network security and operational integrity.

Benefits

  • Voluntary medical, dental, and vision insurance, with flexible spending plan options.
  • Voluntary life, critical illness, accident, and long-term care insurance options.
  • Group term life insurance and short- and long-term disability coverage for qualifying employees.
  • 401(k) match.
  • PTO plan that increases with years of service.
  • Holiday schedule and other leave programs, including bereavement, maternity, jury, and military duty leave.
  • Tuition reimbursement.
  • Professional development reimbursement.
  • Recognition and awards programs.
  • Employee ownership.
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