Senior Threat Hunter: Proactive Cloud & On-Prem Defender

Quest Oracle Community; Sierra Vista (AZ); Hybrid; USD 108,000 - 195,000; Full time

Job summary

Leidos is seeking a Senior Threat Hunter to support the DoW CSSP at Fort Huachuca, AZ. The role involves proactive threat hunting, advanced detection development, and incident response leadership in a hybrid on-site environment.

Applicants must hold an active TS/SCI clearance and have a strong track record in cyber defense across cloud and on-premises systems. You will mentor team members, brief senior leaders, and translate complex findings into clear actions.

Qualifications

• Bachelor's degree and 8+ years of cybersecurity experience.
• 7+ years in cyber analysis, threat hunting, and/or purple-team or blue-team operations.
• Experience with U.S. Government CSSP.
• Active TS/SCI clearance.
• Excellent written, verbal, and interpersonal communication skills.

Responsibilities

• Lead and support incident response during high-severity cyber incidents, providing expert analysis and recommending containment, remediation, and recovery actions.
• Conduct proactive threat hunting across cloud and on-premises subscriber environments to identify and investigate malicious or suspicious activity.
• Identify adversary TTPs and develop countermeasures, including detection rules and correlation logic.
• Build, tune, and monitor AI-assisted detections to identify adversary behavior within customer environments.
• Apply advanced cybersecurity tools and methodologies to detect and mitigate cyber threats and integrate threat intelligence.
• Develop and refine threat-hunting hypotheses based on intelligence and emerging threats.

Skills

Threat hunting

Incident response

Threat analysis

Detection engineering

Cloud and on-premises

Cybersecurity operations

Team mentorship

Executive briefing

Education

Bachelor's degree

Security+ certification

CSSP Analyst certification (CEH/GCIH)

Job description

Leidos is seeking a Senior Threat Hunter to support the DoW CSSP at Fort Huachuca, AZ. The role involves proactive threat hunting, advanced detection development, and incident response leadership in a hybrid on-site environment.

Applicants must hold an active TS/SCI clearance and have a strong track record in cyber defense across cloud and on-premises systems. You will mentor team members, brief senior leaders, and translate complex findings into clear actions.