Cyber Threat Hunter

Signature Federal Systems , LLC; McLean (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

Signature Federal Systems, LLC is seeking a Cyber Threat Hunter in McLean, VA to proactively detect, investigate, and mitigate threats within a large enterprise. The role emphasizes hypothesis-based threat hunting (HMM-4) and the Mitre ATT&CK framework, collaborating with endpoint, network, threat intel, cloud, and data science experts to identify and respond to emerging threats.

Candidates must hold an active TS/SCI clearance with a full scope polygraph.

Qualifications

• Minimum 3 years as a cyber security analyst or related role; 4-6 years preferred.
• Experience with hypothesis-based hunting (HMM-4) and Mitre ATT&CK.
• Strong proficiency with SIEM, EDR, and network traffic analysis.

Responsibilities

• Conduct proactive threat hunting using HMM-4 and Mitre ATT&CK.
• Develop hypotheses for targeted threat hunts from threat intel and data.
• Collaborate with teams to collect and analyze security events from logs, alerts, and telemetry.
• Identify IOCs and anomalies using cutting-edge tools and techniques.
• Analyze threats, assess impact, and recommend remediation and response.

Skills

Threat hunting

Hypothesis hunting

Analytical thinking

Communication skills

Problem solving

Education

GCIH

CTIA

CThH

Tools

SIEM

EDR

Network analysis

Cloud platforms

Job description

Cyber Threat Hunter

Location: McLean

***Per client requirement, candidates must possess an active TS/SCI clearance with a full scope polygraph***

Position Description

As a Cyber Threat Hunter, you will be responsible for proactively detecting, investigating, and mitigating cyber threats within our large enterprise environment. Your primary focus will be on hypothesis-based threat hunting utilizing the HMM-4 approach and leveraging the Mitre ATT&CK framework. You will collaborate closely with cross-functional teams, including endpoint, network, offensive, threat intelligence, cloud, and data science experts, to identify, analyze, and respond to emerging threats.

Responsibilities

• Conduct proactive threat hunting using the HMM-4 approach and Mitre ATT&CK framework.
• Develop and refine hypotheses for targeted threat hunts based on threat intelligence, internal data, and analysis of attacker tactics, techniques, and procedures (TTPs).
• Collaborate with internal teams to collect and analyze security event data from various sources, such as logs, alerts, network traffic, and endpoint telemetry.
• Utilize cutting-edge tools and technologies to identify indicators of compromise (IOCs) and anomalies that may indicate potential threats.
• Perform in-depth analysis of identified threats, assess their impact, and recommend appropriate mitigation and response strategies.
• Document investigative objectives and progress throughout threat hunt. Produce detailed reports and provide clear and concise communication on findings, to include root cause analysis and recommendations for remediation and risk mitigation. Propose enhanced detections where possible defensive gaps are identified.
• Stay up to date with the latest cyber threats, attack techniques, and security technologies through continuous learning and knowledge sharing.

Basic Qualifications

• Minimum of 3 years of experience as a cyber security analyst, incident responder, or other closely related cyber security discipline. 4-6 years of experience desired.
• Professional Experience: Minimum of 3 years of experience as a cyber security analyst, incident responder, or other closely related cyber security discipline. 4-6 years of experience desired
• Methodological Expertise: Strong proficiency in hypothesis-based hunting (HMM-4), the Mitre ATT&CK matrix, and mapping adversary TTPs to observed activities.
• Technical Toolset: Hands-on proficiency with SIEM platforms, EDR solutions, network traffic analysis tools, and a deep understanding of cloud environments (AWS, Azure, etc.).
• Analytical & Communication Skills: Exceptional problem-solving skills in high-pressure situations, with the ability to translate complex technical findings for both technical and non-technical audiences.

Education & Certification:

Relevant industry certifications (e.g., GCIH, CTIA, or CThH) and a solid foundation in network protocols and endpoint security.