Senior System Administrator (1-Year Contract)

Protecthealth Corporation; Sepang; On-site; MYR 100,000 - 150,000; Full time

Job summary

A healthcare company in Sepang, Selangor is seeking an experienced Senior System Administrator for a 1-Year Contract. You will manage on-premise servers and databases, ensuring system stability and security. Responsibilities include administration of Linux/Windows systems, database optimisation, and troubleshooting network issues. The ideal candidate has a degree in IT and 5-7 years of experience. Join us to support our mission-critical applications and improve operational efficiency.

Qualifications

• Degree in Computer Science/IT or equivalent.
• 5–7 years of hands-on experience in System Administration.
• Proficient with Ubuntu, RHEL/CentOS, Windows Server, VMware/Hyper-V.

Responsibilities

• Manage and maintain Linux/Windows servers and storage systems.
• Administer and optimise MySQL & PostgreSQL databases.
• Implement system hardening, patching, access controls, and vulnerability remediation.

Skills

System Administration

Security hardening

Troubleshooting TCP/IP

Monitoring tools

Database optimisation

Education

Degree in Computer Science/IT or equivalent

Tools

Ubuntu

RHEL/CentOS

Windows Server

VMware/Hyper-V

Job description

Senior System Administrator (1-Year Contract)

Protecthealth Corporation – Sepang, Selangor

We are looking for an experienced Senior System Administrator to manage and maintain our on-premise servers, databases, storage systems, and mission-critical applications. You will play a key role in ensuring system stability, strong security posture, high availability, and smooth day-to-day operations for the organisation.

What you’ll be doing

Manage and maintain Linux/Windows servers, virtualisation hosts (VMware/Hyper‑V), and storage systems.

Administer and optimise MySQL & PostgreSQL databases, including backup, tuning, and troubleshooting.

Oversee NAS storage, PACS imaging retention, and rsync‑based replication.

Implement system hardening, patching, access controls, and vulnerability remediation.

Support web application environments (Yii2, Laravel, PHP/PostgreSQL stack).

Maintain and improve system monitoring using Zabbix, Grafana, logs, and utilisation scripts.

Execute backup and disaster recovery (DR) procedures and conduct readiness tests.

Troubleshoot network issues (TCP/IP, VLANs, VPN, routing, firewall policies).

Prepare and maintain technical documentation, SOPs, and configuration standards.

Provide Level 3 escalation support with root‑cause analysis and preventive actions.

Participate in infrastructure upgrades, scaling, HA improvements, and technology adoption.

Provide standby/on‑call support during maintenance windows or system outages.

What we’re looking for

Degree in Computer Science/IT or equivalent.

5–7 years of hands‑on experience in System Administration.

Proficient with Ubuntu, RHEL/CentOS, Windows Server, VMware/Hyper‑V.

Solid knowledge in security hardening, patching, and access control.

Skilled in troubleshooting TCP/IP, VLANs, VPN, routing, and firewall‑related issues.

Experience with monitoring tools (Zabbix, Nagios, Grafana, Elastic Stack).

Experience in backup/DR planning, NAS management, and database optimisation.

Strong documentation and SOP‑writing abilities.