IT System Administrator (ID:712082)

Salary: ฿40,000 – ฿50,000 per month

Overview

We are seeking an experienced IT System Administrator to manage and support our enterprise IT infrastructure across on-premises and cloud environments. This role requires strong expertise in Microsoft Azure, Active Directory, Microsoft Exchange, Windows Server, VMware, Networking, and IT Security. The successful candidate will play a key role in ensuring system reliability, business continuity, cybersecurity, and infrastructure modernization within a manufacturing environment.

Key Responsibilities

Infrastructure Administration

• Manage and maintain Windows Server environments, including Active Directory (AD), DNS, DHCP, Group Policy (GPO), File Services, and related Microsoft technologies.

• Administer and optimize Microsoft Exchange and Microsoft 365 mail services.

• Manage VMware ESXi and vCenter environments, including virtual machine provisioning, resource allocation, performance tuning, and capacity planning.

• Monitor infrastructure performance, system health, and availability to proactively identify and resolve issues.

• Execute system upgrades, patch management, security updates, and infrastructure improvements.

Cloud & Hybrid Infrastructure

• Administer and support Microsoft Azure services, including Virtual Machines, Virtual Networks, VPN Gateway, Storage Accounts, Backup, and Disaster Recovery solutions.

• Manage and support Microsoft Entra ID (Azure AD), identity management, and access control.

• Maintain hybrid integration between on-premises infrastructure and Azure cloud services.

• Review cloud utilization and recommend improvements for security, performance, scalability, and cost optimization.

Network & Security Operations

• Manage enterprise networking infrastructure including Switches, Firewalls, Routers, Wireless Networks, and VPN connectivity.

• Troubleshoot network and connectivity issues through structured root cause analysis.

• Implement infrastructure security best practices, including system hardening, privileged access management, MFA, and vulnerability remediation.

• Support IT security audits, incident response, and compliance requirements.

Backup, Recovery & Business Continuity

• Manage backup and disaster recovery solutions for servers, virtual machines, cloud workloads, and critical business systems.

• Conduct recovery testing and ensure compliance with RPO/RTO requirements.

• Maintain documentation of recovery procedures and technical operations.

IT Support & Continuous Improvement

• Provide Level 2 and Level 3 technical support for infrastructure-related incidents.

• Coordinate with external vendors and internal stakeholders for system implementation and support activities.

• Create and maintain IT documentation, SOPs, network diagrams, asset inventories, and technical procedures.

• Develop automation solutions using PowerShell, Power Automate, and Power Apps to improve operational efficiency.

• Participate in infrastructure projects, digital transformation initiatives, and continuous improvement activities.

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Qualifications

Required

• Bachelor's Degree in Computer Science, Information Technology, Engineering, or related field.

• Minimum 3-5 years of experience in IT Infrastructure, System Administration, or Network Administration.

• Strong hands-on experience with:

  • Microsoft Azure

  • Active Directory (AD)

  • Microsoft Exchange / Microsoft 365

  • Windows Server Administration

  • VMware ESXi & vCenter

  • DNS, DHCP, Group Policy (GPO)

  • Enterprise Networking (Switches, Firewalls, VPN)

• Experience managing hybrid cloud and on-premises environments.

• Strong troubleshooting, analytical, and problem-solving skills.

• Good command of Thai and Business English.

Preferred

• Experience in a manufacturing or factory environment.

• Experience with Microsoft Entra ID, Azure Backup, Azure Site Recovery, Intune, and Microsoft 365 Administration.

• Knowledge of cybersecurity best practices and disaster recovery planning.

• Microsoft certifications such as:

  • Azure Administrator (AZ-104)

  • Microsoft 365 Administrator

  • Windows Server Certification

  • VMware VCP