Active Directory Infrastructure Senior Specialist

DFI Technology (Philippines); Mandaluyong; On-site; PHP 900,000 - 1,200,000; Full time

Job summary

DFI Technology Philippines is seeking an Infrastructure Senior Specialist to maintain Windows Server environments, AD services (DNS, DHCP, NPS, CA, WSUS), and related tools across on‑premises and cloud. You will drive migrations, modernization, and documentation while ensuring security and reliability.

With 5+ years in Windows System Administration, you will tackle complex incidents, develop automation, support virtualization and backup platforms, and participate in disaster recovery tests.

Qualifications

• Bachelor's Degree in Computer / Information Technology or relevant field.
• Min. 5 years of solid Windows System Administration experience (AD, DNS, NPS, CA, DHCP, WSUS).
• Experience in Active Directory design, engineering and migration projects.
• Knowledge of Cloud environments such as Azure, AWS and GCP.
• Experience with virtualization and backup solutions is a plus.
• Excellent English communication, analytical, and detail-oriented skills.
• Ability to work in a fast-changing, multi-cultural environment and own tasks.

Responsibilities

• Lead and support AD transformation, migration, and modernization initiatives.
• Administer AD services, including identity and access management, GPO, DNS.
• Support on‑premises and cloud server infrastructure operations.
• Troubleshoot complex issues and perform root cause analysis.
• Monitor infrastructure availability, performance, and security.
• Execute migrations, upgrades, DR testing, and recovery operations.
• Develop automation scripts to improve efficiency.
• Maintain documentation and inventories.
• Ensure security and change management compliance.
• Collaborate with cross-functional teams, vendors, and stakeholders.
• Provide on-call support and travel to regional locations as required.
• Mentor team members and support knowledge sharing.

Skills

Windows Server Admin

AD design/engineering

Cloud environments (Azure, AWS, GCP)

Automation/Scripting

Backup solutions (Veeam, Cohesity)

Virtualization (VMware/Nutanix/Proxmox

Storage management

English communication

Analytical thinking

Ownership & teamwork

Education

Bachelor's Degree in Computer / Information Technology

Tools

Graylog

Zabbix

CheckMK

Qualys

Job description

The Server Infrastructure team is responsible for the management, support, and optimization of enterprise server environments across DFI domains. This includes operating systems, on-premises and cloud-based server infrastructure, backup and recovery solutions, virtualization platforms, storage systems, and Microsoft services such as Active Directory, DNS, DHCP, NPS, Certificate Services (CA), and WSUS. The team operates using both ITIL and Agile methodologies to deliver reliable, secure, and scalable infrastructure services, while driving operational excellence and alignment with DFI's values and business objectives.

Is this your next challenge in Windows Administration, Backup, Virtualization and Storage?

The challenge is to:

An Active Directory Infrastructure Senior Specialist is responsible for maintaining Servers, Tools, OS related Applications, and other Services under the I.T. infrastructure. Likewise, initiates improvements, deliver major and complex tasks and projects within the agreed services between DFSC, The Dairy Farm Group and its Business units.

Key Responsibilities:

• Lead and support Active Directory (AD) transformation, migration, and modernization initiatives across DFI environments.
• Administer and maintain AD services, including identity and access management, Group Policy, DNS, and related Microsoft infrastructure services.
• Support server infrastructure operations across on-premises and cloud environments, including operating systems, virtualization, storage, and backup platforms.
• Troubleshoot complex infrastructure and identity-related issues, perform root cause analysis, and implement preventive actions.
• Monitor and maintain infrastructure availability, performance, and security using enterprise monitoring and management tools.
• Execute infrastructure projects and major operational activities, including migrations, upgrades, disaster recovery testing, and recovery operations.
• Develop and maintain automation scripts and tools to improve operational efficiency and service reliability.
• Maintain technical documentation, operational procedures, and infrastructure inventories.
• Ensure compliance with security, audit, and change management requirements.
• Collaborate with cross-functional teams, vendors, and business stakeholders to deliver infrastructure and transformation initiatives.
• Provide on-call support and work outside normal business hours, including day or night shifts, during production migrations and critical project activities.
• Travel to regional locations as required to support migration activities, project implementation, and end-user support.
• Support knowledge sharing and mentoring activities within the team.

Do you have experience as an Infrastructure Specialist?

• Bachelor's Degree in Computer / Information Technology or relevant course study
• Min. 5 years of solid Windows System Administration experience (AD, DNS, NPS, CA, DHCP, WSUS and the like)
• Experience in Active Directory designing, engineering and implementation like migration from old Forest Domain to new Forest Domain with Applications tied to AD
• Must have knowledge and experience in troubleshooting and administering Cloud environments like Azure, AWS and GCP
• Knowledge of Graylog, Zabbix, and CheckMK is an advantage
• Knowledge of Qualys Vulnerability Remediations is an advantage
• Knowledge in Automation or Scripting is an advantage
• Knowledge in Backup solutions like Veeam and Cohesity is an advantage
• Knowledge in Virtualization platform like VMware, Nutanix and Proxmox is an advantage
• Knowledge in Storage Management is an advantage
• Technical Certification is a plus
• Excellent interpersonal, verbal, and written communication skills in English
• Highly analytical and able to resolve multiple priorities
• Strong attention to details
• Able to adapt to a fast-changing and multi-cultural environment
• A team player with a good sense of ownership and commitment

If you have the right skills and experience, this is an opportunity to build your career with Asia’s leading retailer.

DFI Retail Group is an equal opportunity employer and responsible for ensuring that all personal information collected from each Candidate presented to DFI Retail Group is used for recruitment purposes only and the personal data will be kept and handled confidentially. We will retain the applications of candidates not selected for a period of no more than 24 months. The data collection process is in accordance with all applicable laws and compliant with the Code of Practice on Human Resource Management

To find out more about Our Businesses and Our People, please visit our website: https://www.DFIretailgroup.com