Senior Security Engineer M365 MS Defender Up 3000

Top 3 Reasons To Join Us Flexible Work from Home. Opportunity to improve English skills. Attractive Salary and Benefits. The Job

CodeHQ Vietnam is looking for a Senior Security Engineer to join our team in Ho Chi Minh City (District 12).

In this role, you will provide hands-on support across Microsoft 365, Microsoft Defender, and core Microsoft infrastructure.

This is a security operations role for one of CodeHQ’s client - an IT solutions provider with customers across Australia. The work will be split approximately 60/40, with around 60% focused on delivering security operations and technical services to the client’s customers, and 40% providing internal support for the client.

We are looking for someone who can work directly with stakeholders, manage tasks independently, and communicate clearly in English.

Your Skills and Experience

Core technical skills

• Microsoft 365 & Microsoft Defender
• Security alert monitoring, incident investigation and remediation
• Entra ID, Conditional Access
• Active Directory, DNS, DHCP & Group Policy
• Scripting and automation

Day-to-day responsibilities

• Monitor the Microsoft Defender portal (Defender XDR) daily
• Review incidents, alerts, and security risks
• Triage alerts from:
  • Defender for Endpoint
  • Defender for Office 365
  • Defender for Identity
  • Microsoft Defender for Cloud Apps
• Investigate security incidents
• Identify the scope, impact, and root cause of incidents
• Perform remediation actions such as:
  • device isolation
  • containment actions
  • user or session risk remediation
  • email threat remediation, including quarantine and purge actions
  • policy tuning to reduce false positives
• Review Secure Score and Exposure Score
• Identify and prioritise security improvement actions
• Track remediation progress with stakeholders
• Support threat hunting and proactive risk identification
• Use Defender tools and advanced queries where required
• Follow security playbooks and escalation procedures
• Maintain clear records of incidents, investigation notes, and remediation actions
• Work directly with stakeholders to escalate risks and support response activities
• Provide recommendations to improve overall security posture

Preferred skills and qualifications

• Relevant Microsoft certifications
• Experience with Hyper-V virtualisation
• Ability to support virtual environment design and deployment
• Ability to build and maintain strong relationships with customers, partners, and vendors
• Skills in Power Automate

Essential soft skills and experience

• Strong English communication skills, both spoken and written (IELTS certification is preferred)
• A team player with a positive attitude and professional approach
• 5+ years of hands-on experience in customer-facing environments
• Experience working with overseas customers

Interview Process

Interviews will be held online or optionally at our CodeHQ office in QTSC, District 12

Why You'll Love Working Here

At CodeHQ, building great software is all about people who care about the problem, enjoy working together, and take pride in delivering great outcomes. We understand the importance of becoming part of our clients’ cultures and adding value to their teams.

You will have the opportunity to work with great customers, and no two days will be the same. We value the cultural diversity of our Vietnam and New Zealand offices, and we celebrate success while recognising people who go above and beyond.

Apply today to join our team and enjoy:

• 14 days annual leave and 4 days sick leave
• 13th-month bonus
• Lunch allowance
• Attractive salary, reviewed twice a year
• Hybrid working model – work from home or office
• Bao Viet accident and healthcare insurance
• English training programme and practical use with New Zealand colleagues and customers
• Access to premium learning and development resources
• Modern office space with good facilities, including a fully stocked pantry
• Cash gifts for special occasions, including Tet Holiday, Vietnam National Day, and Liberation Day
• Team vacation trip, team building activities, and monthly happy hour
• And much more