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Senior Cyber Threat Hunter (Mobile Network Security)

Japan
Visa Sponsorship
This Job is No Longer Active This position is no longer accepting applications
AI Summary

Proactively hunt advanced cyber threats in mobile network environments to strengthen defense posture. Develop and execute hypothesis-driven campaigns, translate findings into actionable security improvements, and collaborate with cross-functional teams to mitigate risks. Requires 10-12 years of cybersecurity expertise, deep threat hunting, and telecom/network security knowledge.

Key Highlights
Proactive threat hunting in mobile network and cloud-native environments using MITRE ATT&CK framework
Collaborate with SOC, Incident Response, and Detection Engineering teams to enhance security posture
Automate analysis and detection processes using scripting (Python, PowerShell) and AI/ML tools
Key Responsibilities
Develop and execute hypothesis-driven threat hunting campaigns to identify anomalous or malicious activity in mobile network and cloud environments
Research adversary Tactics, Techniques, and Procedures (TTPs) using MITRE ATT&CK framework to build and test threat hypotheses
Translate threat hunting findings into actionable security improvements, including detection logic, false positive guidance, and validation steps
Collaborate with Detection Engineering to enhance detection rules, playbooks, and improve threat hunting methodologies
Support incident response efforts by operationalizing threat insights and assisting in investigations and containment
Perform in-depth technical analysis of attacker tradecraft, including lateral movement, persistence, and exfiltration techniques
Utilize advanced security tools (SIEM, UEBA, forensic platforms) to conduct hunts and confirm threats
Automate analysis and detection processes using scripting languages (Python, PowerShell) to improve efficiency

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Technical Skills Required
Cyber Threat Hunting MITRE ATT&CK Framework Telecommunication Protocols (4G/5G, SS7, Diameter, GTP)
Benefits & Perks
Visa sponsorship available

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Nice to Have
SANS FOR508 or CISSP certification
Proficiency in Japanese
Experience with AI/ML models and Large Language Models (LLMs) for threat hunting

Job Description

Senior Cyber Threat Hunter

We are seeking a senior Threat Hunter to join our client's growing cyber defense organization.

This role is crucial for proactively identifying and mitigating advanced threats, ensuring the resilience and security of our cutting-edge mobile network.

Job Duties

The Senior Cyber Threat Hunter will play a critical role in strengthening the company's cyber defense posture. This position requires a highly proactive, detail-oriented, and process-driven individual who can translate hunting outcomes into clear, actionable recommendations for improving security and mitigating future risks.

Key Responsibilities:

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Job Overview
Posted Sep 19, 2026
Employment Full-time
Experience Mid-Senior level
Location Japan
Category Networking
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