SK hynix Dalian Memory Technology and Manufacturing (DMTM) is hiring an Endpoint Security Engineer in Dalian, China. Full-time, on-site; salary approximately RMB 15,000-30,000/month. Overview: design, implement, and operate security controls across enterprise endpoints, identities, and the Microsoft 365 ecosystem; act as senior responder for security incidents while supporting SOC operations. Key responsibilities include Microsoft 365 security engineering (Exchange Online, SharePoint, OneDrive, Teams, Entra ID, Defender for Office 365/Identity/Cloud Apps), data protection via Microsoft Purview (MIP, DLP), SOC incident operations and response (phishing, BEC, malware, ransomware, endpoint compromise, identity attacks, account takeover, data exfiltration), endpoint security policy management, and security audit support (ISO 27001, SOX, AEO). Required qualifications: Korean language proficiency (mandatory); Bachelor's degree or higher in Information Security, Computer Science, Information Systems, or related field; 5+ years enterprise security engineering, endpoint security, or SOC operations experience; hands-on expertise with Microsoft Defender for Endpoint, Microsoft Purview, Entra ID, Microsoft 365 Security & Compliance Center; proven incident response experience; global or regional SOC environment experience; Microsoft security certifications (SC-200, SC-300, SC-400, or equivalent). On-site presence required in Dalian; relocation within China may be available.