OT Security Engineer

Description 【Purpose & Scope】 We are seeking a skilled and motivated Operational Technology (OT) Security Engineer who will oversee networks used for manufacturing operations and have the necessary operational knowledge to advise network changes, assuring continued network availability. The OT Network Security Engineer will support Site Focal Point with technical insight necessary according to policies and have a role in new system implementation. 【職務の内容 / Essential Job Responsibilities】 （雇入れ直後）-Support the implementation of key network controls such as segmentation to isolate different parts of the OT environment, zoning to secure conduits for communication between zones and firewall management. - Follow the change control processes to ensure that network changes are appropriate tested and approved without disruption to critical OT operations. - Support the technical response to operational technology-related incidents, ensuring rapid resolution to minimize downtime and operational disruption. - Harden devices such as switches, routers, firewalls by partnering and coordinating with the SMEs and global OT Security Team and other key stakeholders aligned to Astellas standards and proportionate to risk. - Support the security of OT communication protocols by enabling encryption, authentication or using protocol-specific security enhancements where possible. - Mitigate vulnerabilities that could lead to a breach of confidentiality, integrity, or availability across the OT networks. - Work with the site team and vendors to identify & deploy security patches and updates for the OT network. - Configure and maintain firewall rules and associated documentation tailored for OT networks. - Support the implementation of cybersecurity measures specific to operational technology environments. - Work with key technology and business stakeholders to ensure that network configurations and critical security appliances such as firewalls are backed up regularly and that recovery plans are in place in case of system failures, outages and / or cyber-attacks. - Support operational technology compliance with internal security and risk management policies and practices, as well as external regulatory and statutory requirements. - Collaborate with internal owners of security technologies such as antivirus, IDS / IPS, SIEM, endpoint detection & response, configuration management, privileged identify management, etc. - Work closely with the site operations teams and MSPs to deliver cybersecurity risk reduction initiatives - Stay up-to-date with industry trends, technologies, and best practices to continuously improve network infrastructure and security （変更の範囲） 会社内での全ての業務【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＞

• Strong proficiency in written and verbal English and Japanese languages.
• In-depth understanding of network architecture to design, implement, and manage secure and efficient networks.
• Proficiency with cybersecurity tools (e.g., firewalls, intrusion detection / prevention systems) and techniques to protect network integrity and respond to security incidents.
• Strong ability to collaborate with cross-functional teams and communicate technical insights effectively to support secure file management and other security initiatives.
• Expertise in ensuring manufacturing adherence to OT security policies and standards. Skill in driving initiatives that support security, innovation, and efficiency within the manufacturing environment.
• Self-confident / assertive / dynamic / motivated behaviour & being able to work on multiple tasks / projects in parallel with supervision. ＜歓迎 / Preferred＞
• HNC or Degree Level in Computing, Engineering, Information Technology
• Experience in network engineering roles.
• Completed relevant network related certifications (CISSP, CompTIA Security+, GICSP and / or, ISA / IEC 62443) or equivalent.
• Basic knowledge of the IT / OT network principles
• Experience supporting systems / applications used in pharmaceutical, clinical, or related fields would be an asset.
• Experience in Cyber security risk reduction for IT / OT infrastructure.
• Familiar with cloud computing and security standards for cloud first environment.