Senior Systems Administrator - Cloud, Security Leadership

MicroSourcing International; Pasig; On-site; PHP 900,000 - 1,500,000; Full time

Benefits offered by this job

Healthcare coverage from day one

Paid time-off with cash conversion

Group life insurance and performance-

Job summary

MicroSourcing in Ortigas, Pasig, is seeking a Senior System Administrator to lead technical operations across Microsoft 365, Azure, Windows Server, and related cloud environments.

You will manage access, backups, and security controls; oversee network infrastructure; drive upgrades and cloud migrations; mentor junior IT staff; and coordinate vendor support, with three days on-site per week aligned to Australian business hours.

Qualifications

• Minimum 7 years of enterprise IT experience.
• Strong Microsoft 365 and Azure administration.
• Windows Server administration experience.
• Proven enterprise networking experience (firewalls, routing, switching).
• Hands-on experience with AWS, Google Cloud, or equivalent hybrid cloud.
• Excellent communication and ability to explain technical topics.

Responsibilities

• Provide senior-level technical support and escalation for IT issues.
• Administer Microsoft 365, Azure, Windows Server and other cloud environments.
• Manage access, devices, onboarding/offboarding, patching, backups, and monitoring.
• Maintain enterprise network infrastructure (firewalls, routers, switches, wireless).
• Lead upgrades, cloud migrations, and infrastructure improvements.
• Implement IT security controls including MFA and VPN.
• Support ISO 27001 and ACSC Essential Eight compliance.
• Coordinate with vendors for IT support and licensing.
• Mentor junior IT staff and maintain documentation.
• Provide after-hours support when required.

Skills

Microsoft 365 & Azure

Windows Server

Enterprise networking

AWS / Google Cloud (hybrid)

Security tooling & best practices

Communication

Tools

SharePoint

OneDrive

Teams

Exchange

Intune

Job description

MicroSourcing in Ortigas, Pasig, is seeking a Senior System Administrator to lead technical operations across Microsoft 365, Azure, Windows Server, and related cloud environments.

You will manage access, backups, and security controls; oversee network infrastructure; drive upgrades and cloud migrations; mentor junior IT staff; and coordinate vendor support, with three days on-site per week aligned to Australian business hours.