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要約求人票をもとにAIがまとめたものです
The Senior Cyber Threat Hunter will proactively identify and mitigate advanced threats to strengthen Rakuten Mobile's cyber defense posture. The role develops and executes hypothesis-driven hunts, analyzes security data, and translates findings into actionable detection improvements while supporting incident investigation and containment.
応募資格
必須
- Minimum of 10-12 years of experience in cybersecurity, with strong expertise in Cyber Threat Hunting.
- Demonstrable experience in Incident Response and Forensics.
- Exposure to Security Operations, Threat Intelligence, and Malware Analysis.
- Bachelor's degree in Computer Science, Cybersecurity, Information Systems, or a related field, or equivalent practical experience.
- In-depth knowledge of the MITRE ATT&CK framework, including the ability to map adversary behaviors to understand attack vectors and predict potential threats.
- Strong understanding of enterprise network architecture, including advanced networking concepts (e.g., TCP/IP, routing, firewalls, VPNs), networking protocols, deep packet inspection, and network traffic analysis.
- Expertise in telecommunication protocols and infrastructure, particularly those relevant to mobile environments (e.g., 4G/5G, SS7, Diameter, GTP), and the ability to identify threats within these specialized networks.
- Deep understanding of cloud-native environments, including Kubernetes and container orchestration, with proven experience in hunting for threats and anomalies within these complex infrastructures.
- Demonstrated experience with major cloud platforms (e.g., AWS, Azure, GCP) and their native security services, with the ability to perform threat hunting across diverse cloud environments.
- Experience and strong interest in leveraging advanced AI capabilities, including Machine Learning (ML) models and Large Language Models (LLMs), to enhance threat hunting, automate analysis, and improve operational efficiency.
- Knowledge of secure architecture and design principles, with the ability to identify potential weaknesses and propose proactive hunting strategies based on system design.
- Understanding of regulatory compliance and data privacy requirements relevant to cybersecurity operations.
- English (Overall - 3 - Advanced)
歓迎
- Industry certifications such as SANS FOR508, CISSP.
求める人物像
- Exceptional analytical expertise, critical thinking, and problem-solving skills, with a keen attention to detail.
- Excellent written and verbal communication skills, with the ability to present complex technical information and metrics clearly to both technical and non-technical audiences.
- Demonstrated strong documentation discipline, capable of producing repeatable work and facilitating clean handoffs.
- Ability to work effectively in a fast-paced, operational environment, including flexibility for non-standard work hours in response to cybersecurity incidents.
- A strong aptitude for continuous learning and adapting quickly to new technologies and threat landscapes.
使用ツール
募集要項最終確認 9/25
- 職種
- セキュリティエンジニア
- 雇用形態
- 記載なし
- 役職
- Senior Cyber Threat Huntersenior Threat Hunter
- 給与
- 記載なし
- 勤務地
- Tokyo, Japan
- 働き方
- 記載なし
- 経験年数
- 10年以上
- 学歴
- 大学卒業以上
- 掲載日
- 2026/09/05 13:10（24日前）
- 最終確認
- 2026/09/25 20:07（4日前）
仕事内容
募集内容
We are seeking a senior Threat Hunter to join our 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 Rakuten Mobile'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
Develop and execute hypothesis-driven campaigns, meticulously analyzing large volumes of log, endpoint, and network data to uncover anomalous or malicious activity, and thoroughly documenting findings.
Research and track adversary Tactics, Techniques, and Procedures (TTPs), leveraging frameworks like MITRE ATT&CK to build and test threat hypotheses beyond simple Indicator of Compromise (IOC) searches.
Translate hunting outcomes into actionable security enhancements, creating detection logic, data requirements, false positive guidance, and validation steps for new and refined detections.
Collaborate closely with the Detection Engineering team to enhance detection rules and playbooks, and contribute to the continuous improvement of hunting methodologies.
Partner with Cyber Threat Intelligence, Incident Response, and SOC teams to operationalize threat insights, provide support during incidents, and assist in investigation and containment efforts.
Perform in-depth technical analysis of attacker tradecraft, including lateral movement, persistence, and exfiltration techniques, to understand attack vectors and establish intrusion chains.
Utilize advanced security tools such as SIEM, UEBA, and forensic analysis platforms to conduct hunts and confirm threats.
Automate analysis and detection processes using scripting languages (e.g., Python, PowerShell) to improve efficiency and scale.
Stay current with the evolving threat landscape and emerging adversary techniques to maintain effective threat hunting capabilities.
この求人は楽天モバイル株式会社の採用ページの掲載内容をもとに構成しています。応募条件の最新情報は募集元をご確認ください。
東京都のセキュリティエンジニアの求人701件
- SOC・セキュリティ運用基盤の企画・構築・運用
- セキュリティエンジニア
- セキュリティエンジニア
- ドコモビジネスにおける新たなRINKセキュリティサービスの開発、及び、既存NWセキュリティサービスの機能追加開発
- セキュリティ・ガバナンス基盤構築_テックリードエンジニア
- セキュリティエンジニア
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応募は楽天モバイル株式会社の採用ページで受け付けています。このページは採用ページの掲載内容をもとに構成しているため、最新の応募条件は募集元でご確認ください。
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