Security Engineer — Cloud, Firewall & Email Protection

KOS International Holdings; Hong Kong; On-site; HKD 360,000 - 600,000; Full time

Job summary

KOS International Holdings is seeking a Systems & Security Engineer for a well-known organization in the education sector in Hong Kong. The role supports day-to-day cybersecurity operations and IT infrastructure, administering security controls across firewalls, Microsoft 365, Azure and endpoints.

You will monitor security alerts, coordinate with vendors and the SOC, and assist with security assessments, audits and improvements.

Qualifications

• Degree in IT, CS, cybersecurity or related discipline.
• 3–5 years in system administration, infrastructure or cybersecurity operations.
• Hands-on with Microsoft 365, Azure or Entra ID.
• Knowledge of firewall, endpoint protection, email security and access control.
• Familiar with DLP, vulnerability management, incident response and monitoring.
• Good English and Chinese communication.
• Willing to work with vendors and internal users.

Responsibilities

• Administer firewall rules and network-security configurations.
• Monitor Microsoft 365 email security, suspicious login activities and alerts.
• Support M365, Azure, Entra ID, Defender, endpoint security and access controls.
• Assist with DLP, email-protection and endpoint-protection policies.
• Perform hands-on system administration and health checks.
• Investigate security alerts with vendors or SOC for remediation.
• Conduct regular vulnerability reviews and patch follow-ups.
• Maintain security records and incident documentation.
• Support security-awareness activities and audits.

Skills

English/Chinese bilingual

Analytical thinking

Independence

Education

Degree in IT/CS/Cybersecurity

Tools

Microsoft 365

Azure

Entra ID

Firewall administration

Endpoint protection

Job description

KOS International Holdings is seeking a Systems & Security Engineer for a well-known organization in the education sector in Hong Kong. The role supports day-to-day cybersecurity operations and IT infrastructure, administering security controls across firewalls, Microsoft 365, Azure and endpoints.

You will monitor security alerts, coordinate with vendors and the SOC, and assist with security assessments, audits and improvements.