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Lumentum
IT Security AnalystLumentum • Pathumthani, Thailand
IT Security Analyst

IT Security Analyst

Lumentum • Pathumthani, Thailand
มากกว่า 30 วัน
คำบรรยายลักษณะงาน

It's fun to work in a company where people truly BELIEVE in what they're doing!

1. Security monitoring and alert triage

  • Monitor Security Information and Event Management (SIEM), Endpoint Detection and Response (EDR), anti-malware, email security, web security and cloud security alerts.
  • Validate, triage and prioritise security events using agreed playbooks, business impact and risk context.
  • Create accurate incident records, preserve relevant evidence and escalate incidents through the agreed incident management process.
  • Support containment, eradication and recovery activities under the direction of the incident owner.

2. Incident response and operational support

  • Follow documented incident response procedures for malware, phishing, account compromise, data exposure, suspicious network activity and lost or stolen devices.
  • Assist with post-incident actions, including evidence capture, timeline building, lessons learned and remediation tracking.
  • Maintain security operations knowledge base articles and playbooks for repeatable response tasks.

3. Vulnerability and configuration management

  • Run or support scheduled vulnerability scanning across servers, endpoints, network devices, applications and cloud services.
  • Validate scan findings, remove false positives where evidence supports this, assign remediation tickets and monitor progress against agreed service levels.
  • Support secure configuration checks against approved baselines, including endpoint hardening, logging configuration and privileged account controls.
  • Provide clear remediation guidance to infrastructure, application and service teams.

4. Identity, access, Data Loss Prevention and Multi-Factor Authentication

  • Support identity and access management processes, including joiners, movers, leavers, privileged access reviews and evidence collection for access recertification.
  • Monitor and investigate Data Loss Prevention (DLP) alerts, applying agreed classification, privacy and escalation rules.
  • Support Multi-Factor Authentication (MFA) administration, user enrolment, exception handling, break-glass access checks and failed authentication investigations.
  • Assist with user access investigations where suspected compromise, misuse or policy breach is identified.

5. Security controls and tooling

  • Operate security tools in line with documented procedures and change controls.
  • Support maintenance of alert rules, watchlists, endpoint policies, email filtering rules and data protection controls under approved guidance.
  • Record control issues, service defects and improvement opportunities.
  • Carry out routine security checks for backup alerts, logging gaps, certificate expiry, secure configuration and monitoring coverage.

6. Policy, compliance and assurance support

  • Gather evidence for audits, risk assessments, supplier checks and compliance reviews.
  • Apply relevant internal policies, standards and data handling requirements.
  • Support regular checks against security standards, control requirements and business processes.
  • Identify policy exceptions or control gaps and raise them through the agreed risk management process.

7. Awareness and stakeholder support

  • Provide practical security advice to users and technical teams.
  • Support phishing exercises, security awareness activities and targeted communications.
  • Explain security requirements in a clear, proportionate and helpful way.
  • Promote secure behaviours, including reporting suspicious activity, protecting credentials and handling sensitive data correctly.

8. Reporting and documentation

  • Maintain accurate incident, alert, remediation and evidence records.
  • Prepare routine operational reports on alerts, incidents, vulnerabilities, Data Loss Prevention (DLP), Multi-Factor Authentication (MFA), control exceptions and remediation progress.
  • Contribute to dashboards and management information using agreed metrics.
  • Keep procedures, playbooks and technical notes up to date.

Qualifications

  • Bachelor Degree in Computer Science, Information Technology, Cybersecurity, or related fields.
  • At least 1–2 years of experience in IT governance, IT audit, risk, or compliance
  • Experience in cybersecurity risk assessment, threat modeling, control testing, or security governance.
  • Good command of spoken and written in English.
  • Strong analytical and problem-solving skills
  • Good documentation and report-writing abilities
  • Attention to detail and organizational skills
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IT Security Analyst • Pathumthani, Thailand