Senior System Administrator – Microsoft 365, AWS & Servers

Unistar Credit and Finance Corp; Eastern Manila District; Presencial; PHP 700.000 - 1.100.000; Jornada completa

Descripción de la vacante

Unistar Credit and Finance Corp. is seeking a System Administrator Supervisor to manage and optimize cloud infrastructure, Microsoft 365 services, and server environments in Metro Manila.

You will lead initiatives for performance, security, and efficiency while guiding the team and setting best practices. The role focuses on Microsoft 365 administration, AWS or equivalent cloud platforms, and server administration, with opportunities to mentor junior staff and shape long-term infrastructure

Formación

• Hands-on administration of Microsoft 365, Exchange Online, and Entra ID.
• Experience with AWS cloud services and cost optimization.
• Strong Windows Server and Linux administration skills.
• Familiarity with IaC tools: Terraform, CloudFormation.
• Scripting in PowerShell and/or Python.
• Knowledge of IT security best practices and governance.
• Excellent problem-solving, communication, and documentation.
• Ability to mentor junior team members.

Responsabilidades

• Manage Microsoft 365 services including Exchange Online and Entra ID.
• Administer AWS cloud infrastructure for availability, security, and cost efficiency.
• Maintain Windows Server and Linux environments.
• Implement security controls and access policies.
• Lead automation and service optimization initiatives.
• Oversee cloud resource provisioning and lifecycle management.
• Support cloud/infrastructure strategy and best practices.
• Lead migrations, upgrades, and integrations.
• Collaborate with teams to resolve complex issues and improve service delivery.
• Provide mentorship and maintain accurate documentation.

Conocimientos

Microsoft 365

Cloud infrastructure

Server administration

IAM

IaC

PowerShell

Python

Networking

IT security

Documentation

Herramientas

Terraform

CloudFormation

AWS

PowerShell

Python

Exchange Online

Entra ID

Windows Server

Linux

Descripción del empleo

About the role

The System Administrator Supervisor is responsible for managing and optimizing the organization's cloud infrastructure, enterprise productivity services, and server environments. The role focuses on three core areas: Microsoft 365 Administration, Cloud Infrastructure Management (AWS or equivalent platforms), and Server Administration.

This role leads initiatives that enhance system performance, reliability, security, and operational efficiency while supporting the organization's cloud strategy, infrastructure improvements, and service delivery. The position also contributes to long-term infrastructure planning and provides technical leadership, guidance, and mentorship within the team.

Key Responsibilities

• Manage and administer Microsoft 365 services, including Exchange Online, Microsoft Entra ID, identity management, messaging, and collaboration platforms.

• Manage and optimize cloud infrastructure and services, particularly AWS or equivalent cloud platforms, ensuring availability, performance, security, and cost efficiency.

• Administer and maintain Windows Server and/or Linux environments, including configuration, monitoring, troubleshooting, and system optimization.

• 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 technical issues and improve service delivery.

• Provide technical guidance and mentorship to junior administrators.

• Maintain accurate technical documentation, system configurations, and operational procedures.

About You / Qualifications

Core Technical Competencies

1. Microsoft 365 Administration

• Hands‑on experience administering Microsoft 365, Exchange Online, and Microsoft Entra ID.

• Knowledge of identity and access management, messaging, collaboration, and security configurations.

2. Cloud Infrastructure Management

• Advanced experience in AWS (EC2, VPC, RDS, IAM, S3, CloudWatch, Lambda, CloudFormation) or equivalent cloud platforms.

• Experience in cloud resource provisioning, monitoring, security, automation, and cost optimization.

• Knowledge of Infrastructure as Code (IaC) tools such as Terraform and CloudFormation.

3. Server Administration

• Strong experience in Windows Server and/or Linux administration.

• Knowledge of server configuration, maintenance, troubleshooting, system hardening, and performance monitoring.

• Experience with backup management, disaster recovery, and server security.

Additional Qualifications

• Strong understanding of networking concepts, including DNS, VPN, firewalls, and routing.

• Experience with scripting and automation using PowerShell and/or Python.

• Strong understanding of IT security best practices and general IT governance concepts.

• Excellent problem‑solving, analytical, communication, and documentation skills.

• Ability to lead technical initiatives and provide mentorship to junior team members.