IT Security Administrator | Japanese Major Food Wholesaler

A Japanese food wholesale company is looking for an IT Security Administrator in El Monte, California.

<Job Functions>
• Monitor security events and alerts using SIEM (Security Information and Event Management), Microsoft security tools, and other monitoring platforms
• Perform triage, analysis, and validation of potential security incidents
• Correlate alerts with threat intelligence to determine risk and business impact
• Investigate suspicious activities and respond to security incidents in real time
• Contain threats to prevent lateral movement across systems, endpoints, and networks
• Escalate complex or high-risk incidents to senior analysts as needed
• Operate and maintain security technologies, including SIEM, IDS/IPS, firewalls, DLP, and endpoint protection tools
• Administer and monitor Microsoft Defender and Microsoft 365 security and compliance platforms
• Leverage UEBA and SOAR capabilities to enhance threat detection and automate response processes
• Manage and monitor endpoint security posture across organizational devices
• Support device management platforms (e.g., Microsoft Intune, MDM/MAM solutions)
• Ensure device compliance with corporate security standards, including patching, encryption, and access controls
• Oversee and support company-wide software updates and vulnerability remediation efforts
• Enforce and support security policies, standards, and procedures
• Assist in maintaining compliance with internal and regulatory requirements (e.g., J-SOX)
• Proactively identify and mitigate risks to minimize downtime and business disruption
• Act as a central point of contact for security-related incidents and communications
• Provide security guidance and support to all business units
• Maintain accurate documentation of incidents, investigations, and remediation actions
• Support internal and external audits through reporting and evidence collection
• Supports the implementation of IT policies and procedures, including those pertaining to architecture, security, disaster recovery, standards, and project portfolio management.
• Negotiates and manages vendor, outsourcer, and consultant contracts and service agreements.
• Provides expert support to the new ERP project team leveraging deep operational knowledge.
• Attends Company events and functions outside of normal working hours
• Obligation to answer to all upper management as requested

<Requirements>
•    Business level English required – Read/write/speak/listen
•    Business level Japanese preferred – Read/write/speak/listen
•    Maintain a positive attitude
•    Bachelor’s degree in computer science or information security or related field required.
•    Hands-on experience with Microsoft Defender (Endpoint, Identity, and/or Cloud) and Microsoft 365 Security & Compliance tools
•    Experience with endpoint and device management solutions (e.g., Microsoft Intune, MDM/MAM platforms)
•    Strong understanding of device compliance, patch management, and software update processes
•    Knowledge of security policy implementation and enforcement
•    Familiarity with firewalls, IDS/IPS, vulnerability management, and endpoint protection
•    Proficiency with operating systems (Windows, macOS, Linux)
•    1+ years of cybersecurity required; 3-5 years of experience preferred

<Knowledge and Skills>
•    Knowledge of Incident response and threat analysis
•    Knowledge Network defense and endpoint security
•    Problem-solving skills
•    Advanced Microsoft Office 365 and Defender proficiency
•    Strong Communication and interpersonal skills
•    Exceptional organization and time management skills
•    Excellent mentoring, coaching, and people management skills

【Keywords】
① Cybersecurity
②Microsoft Defender , Microsoft 365 Security & Compliance tools
③ Operating systems (Windows, macOS, Linux)