【募集の背景 / Purpose & Scope】

• As a Cyber Security Engineer, you will play a critical role in safeguarding our organization's information systems and data. This position will join a team who are responsibility for managing security operations, developing automation for threat detection, and working towards 'best in industry' incident response.
• The successful candidate will work collaboratively within the Security Operations Center (SOC) and other Value Teams across the organization to ensure a proactive security posture and to mitigate risks associated with cyber threats in several areas.

【職務の内容 / Essential Job Responsibilities】
(雇入れ直後)

・Security Operations Center (SOC) Management
oSupport daily SOC operations, ensuring effective monitoring support, development of use cases and response to security incidents.

oManage application ingestion processes and email security protocols.

oSupport SIEM management, including logging and alerting.

• Automation Development:

oDevelop and implement automation solutions for alerts from various security sources, ensure firewalls, IDS and EDR tools are working effectively.

oStreamline processes to enhance the efficiency of security operations and help develop communication with other teams.

• Threat Modelling:

oConduct threat modelling for applications to identify vulnerabilities and recommend mitigation strategies.

oAnalyze email tickets and develop tooling to improve response times and effectiveness.

oProvide root cause analysis for the threat found and assist with remediation.

• Anti-Malware and Endpoint Detection:

oAssist in operational efforts to implement a global strategy for anti-virus (AV) solutions and optimize detection capabilities.

oEnsure consistent standards for endpoint detection and response across the organization.

• Incident Response:

oLead or support incident response efforts using an industry-recognized model and report escalations to senior leadership when required.

oCollaborate with Red, Blue, and Purple teams to conduct penetration testing and improve security posture.

oConduct forensic analysis to investigate security incidents and recommend improvements.

• Proactive Threat Hunting:

oEngage in proactive threat hunting to identify potential security threats before they materialize.

oCollaborate with teams to enhance detection and response capabilities.

• Reporting and data analysis:

oEngage in proactive collaboration across Value Teams, working with an agile mindset, and assist in the creation of dashboards and reporting for security governance.

(変更の範囲)

会社内での全ての業務

【就業環境に関する要件 / Specific Physical or Environmental Requirements】

At Astellas we recognize the importance of work/life balance, and we are proud to offer a hybrid working solution allowing time to connect with

colleagues at the office with the flexibility to also work from home. We believe this will optimize the most productive work environment for all employees to succeed and deliver. Hybrid work from certain locations may be permitted in accordance with Astellas' Responsible Flexibility Guidelines.

【応募要件 / Qualifications】
<必須 / Required>

・Proven experience in a cybersecurity role, preferably within a SOC/SIEM/SOAR environment.

・ Strong knowledge of security frameworks, threat modelling, and incident response methodologies.

・ Excellent Japanese and English language skills

<歓迎 / Preferred>
・Bachelor's degree in Computer Science, Information Technology, Cyber Security, or a related field.

・Experience in using Microsoft and Crowdstrike security tools.

・Security certification is an advantage.

・Demonstrate knowledge of change management principles. Relevant certifications (e.g., Certified Information Systems Security Professional CISSP, Certified Ethical Hacker CEH or CompTIA Security+, etc.)

・ Knowledge of email security best practices, including phishing detection, secure email gateways, and email authentication protocols (SPF, DKIM, DMARC)

・Excellent analytical and problem-solving skills.

・Strong communication skills and the ability to work collaboratively in a small team environment where we share capacity and effort.

・Awareness of infrastructure and network security features like firewall rules, event IDs, logging/detection, and managing assets in manufacturing / OT environments.

・Familiarity with anti-malware solutions and endpoint detection strategies.

・Proficiency in scripting languages for automation (e.g., Python, PowerShell) is an advantage.

・Experience in digital forensics (log analysis and technical root cause assessment).

・Experience in email security operations and management

【応募書類 / Application Documents】

和文履歴書(Japanese Rirekisho)・和文職務経歴書・英文レジュメ

Both Japanese and English Resumes are needed

If you do not currently have a "Japanese Rirekisho", please prepare one by the time we issue the offer.

【選考プロセス / Selection details】

書類選考 → 1次面接 → 最終面接

※変更の可能性もございますので、予めご了承下さい。

CV screening → First interview → Final interview

• Please be advised that there might be a change in the process.

【勤務地 / Location】

(雇入れ直後)

東京都中央区 アステラス製薬 日本橋事業所 本社

Nihonbashi, Tokyo

(変更の範囲)

会社の定める事業場および自宅

【勤務開始日 / Start Date】

応相談

Will be decided according to the candidate's flexibility

【契約期間 / Contract Duration】

期間の定めなし

Not limited to specified period

【試用期間 / Probation Period】

試用期間原則なし

No probation period in principle

【給与 / Salary】

①基本給:当人の経歴・技術・技能等を考慮して決定

②裁量労働制の場合:裁量労働手当として職務グレードに応じて50,000~100,000円支給

③フレックスタイム制の場合:月間の所定労働時間を超えて勤務する時間に対して時間外勤務手当を支給

①Base salary: will be decided by the candidate's experience, skill and capability.

②When Discretionary Work System is applied: Discretionary work allowance will be paid.(50,000~100,000yen, based on the Grade)

③When Flextime System is applied: Overtime allowance will be paid for time worked in excess of prescribed working hours.

【昇給 / Salary Raise】

有り

【賞与 / Bonus】

有り

【諸手当 / Allowance】

裁量労働手当、住宅手当、通勤手当 等

Discretionary work allowance, Housing allowance, Commutation allowance, etc.

【勤務時間 / Working Hours】

8:45~17:45(月~木)、8:45~16:00(金)、企画業務型 裁量労働制

裁量労働制の場合、所定労働時間を働いたものとみなす

8:45~17:45(Mon~Thu)、8:45~16:00(Fri)

Discretionary Work System

【休日 / Holidays】

完全週休2日制(土曜・日曜)、祝日、5月1日、夏季、年末年始

Weekends(Sat and Sun), holidays, May 1st, summer vacation, New Year holidays

【休暇 / Vacation Leave】

年次有給休暇、育児休業制度、介護休業制度 等

Annual paid leave, childcare leave system, nursing care leave system, etc.

【福利厚生 / Welfare】

雇用保険、労災保険、厚生年金、健康保険、共済会制度、社宅制度、持株会制度、財形貯蓄制度 等

Employment Insurance, Industrial Accident Compensation Insurance, Welfare Pension Insurance, Health Insurance, Mutual Aid Association System, Company Housing System, Employee Shareholder Association System, Property Accumulation Savings System

【アステラス製薬 採用サイト/ Career web site】

https://re-

For more information about Astellas, please visit our career web site.

"We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law."