IT System Administrator Supervisor

Unistar Credit and Finance Corp; Metro Manila; On-site; PHP 900,000 - 1,300,000; Full time

Job summary

Unistar Credit and Finance Corp is seeking a Senior System Administrator to manage the organization’s cloud infrastructure, identity, collaboration, and productivity platforms. You will ensure performance, security, and reliability while guiding cloud strategy and operational improvements.

You will lead automation efforts, oversee provisioning and cost optimization, and mentor junior admins while maintaining thorough documentation and best practices across IT services.

Qualifications

• Advanced experience in AWS services including EC2, VPC, RDS, IAM, S3.
• Strong Windows Server and Linux administration.
• Hands-on experience with Microsoft 365, Azure EntraID, Exchange Online.
• Strong networking knowledge (DNS, VPN, firewall, routing).
• Scripting/automation with PowerShell and Python.
• Knowledge of IaC tools Terraform and CloudFormation.
• Security best practices and IT governance.
• Experience with monitoring, backup, disaster recovery, and hardening.
• Strong problem-solving and communication/documentation skills.

Responsibilities

• Manage and optimize cloud infrastructure, services, and resources for availability, performance, and security.
• Administer enterprise productivity and collaboration platforms, including identity messaging and communication services.
• Implement and maintain system security controls, access policies, monitoring, and compliance standards.
• Lead system enhancement initiatives, including automation, service optimization, and configuration improvements.
• Oversee cloud resource provisioning, lifecycle management, and cost optimization activities.
• Support the development of cloud and infrastructure strategies, standards, and best practices.
• Lead and participate in service migrations, upgrades, and integration projects.
• Collaborate with cross-functional teams to resolve complex issues and improve service delivery.
• Provide technical guidance and mentorship to junior administrators.
• Maintain accurate documentation, configurations, and operational procedures.

Skills

Cloud infrastructure

Windows/Linux admin

Networking basics

Scripting: PowerShell

Scripting: Python

IaC: Terraform

IaC: CloudFormation

Security best practices

Monitoring & DR

Documentation

Tools

AWS CloudWatch

Terraform

CloudFormation

PowerShell

Python

Microsoft 365

Azure EntraID

Exchange Online

Job description

About the role

The Senior System Administrator is responsible for managing and optimizing the organization's cloud infrastructure and enterprise productivity services, including identity, collaboration, and communication platforms. This role leads initiatives that enhance system performance, reliability, and security while supporting the organization's cloud strategy, operational improvements, and service delivery. The position also contributes to long-term infrastructure planning and providing technical leadership within the team.

Key responsibilities

• Manage and optimize cloud infrastructure, services, and resources to ensure availability, performance, and security.
• Administer enterprise productivity and collaboration platforms, including identity messaging and communication services.
• Implement and maintain system security controls, access policies, monitoring, and compliance standards.
• Lead system enhancement initiatives, including automation, service optimization, and configuration improvements.
• Oversee cloud resource provisioning, lifecycle management, and cost optimization activities.
• Support the development of cloud and infrastructure strategies, standards, and best practices.
• Lead and participate in service migrations, upgrades, and integration projects.
• Collaborate with cross-functional teams to resolve complex issues and improve service delivery.
• Provide technical guidance and mentorship to junior administrators.
• Maintain accurate documentation, configurations, and operational procedures.

About you

• Advanced experience in AWS (EC2, VPC, RDS, IAM, S3, CloudWatch, Lambda, CloudFormation).
• Strong Windows Server and/or Linux administration skills.
• Hands-on experience with Microsoft 365, Azure EntraID, Exchange Online.
• Strong understanding of networking concepts (DNS, VPN, firewall, routing).
• Experience with scripting/automation (PowerShell, Python).
• Knowledge of IaC tools (Terraform, CloudFormation).
• Strong understanding of security best practices and general IT governance concepts.
• Experience with monitoring, backup, disaster recovery, and system hardening.
• Strong problem-solving and analytical abilities.Excellent communication and documentation skills.