Senior Systems Administrator - Infra, Automation & Security

BSO; Davao City; On-site; PHP 600,000 - 800,000; Full time

Job summary

DataOne seeks a System Administrator to install, configure, and maintain robust IT systems and infrastructure across Windows and Linux environments. You will monitor performance, implement backups, script in Bash/Python, and automate deployments with Ansible and GitLab CI/CD.

Collaborating with the CTO and IT Infrastructure team, you will help ensure security, reliability, and scalable operations for international projects while documenting configurations and procedures.

Qualifications

• 5+ years of experience in System Administration, IT Infrastructure, or a similar technical position.
• Strong experience with Windows Server and Debian Linux.
• Good understanding of networking concepts, including L2/L3, VLANs, and firewalls.
• Experience with monitoring tools such as Prometheus and Grafana.
• Experience with infrastructure automation using Ansible.
• Knowledge of GitLab CI/CD.
• Scripting capabilities with Bash and/or Python.
• Experience with logging and monitoring environments.
• Knowledge of HAProxy, BIND, MariaDB, PostgreSQL, and LibreNMS is highly valued.
• Experience managing backups and disaster recovery processes.
• Strong troubleshooting and incident-resolution skills.
• Good understanding of IT security principles and best practices.
• Strong documentation and organizational skills.
• Autonomous, proactive, structured, and results-oriented.
• Ability to work effectively within an international and highly technical environment.
• Strong willingness to continuously learn and expand technical skills.

Responsibilities

• Install, configure, and maintain physical and virtual servers across Windows Server and Linux environments.
• Deploy, configure, and maintain software and operating systems.
• Monitor systems and infrastructure to ensure high availability and performance.
• Manage and monitor backups and disaster recovery plans.
• Diagnose, troubleshoot, and resolve technical incidents.
• Automate infrastructure deployments and system configurations.
• Manage Windows Server environments, including operating system and software deployment and configuration.
• Administer and maintain Debian Linux environments.
• Support networking environments including L2/L3, VLANs, and firewalls.
• Implement and maintain monitoring solutions using Prometheus and Grafana.
• Use Ansible and GitLab CI/CD to automate deployments and configuration processes.
• Develop and maintain scripts using Bash and Python.
• Manage logging solutions including rsyslog and Fluent Bit.
• Work with infrastructure technologies including HAProxy, BIND, MariaDB, PostgreSQL, and LibreNMS.
• Apply a security-first approach across infrastructure projects and daily operations.
• Document systems, configurations, procedures, and technical processes.
• Track and manage assigned IT projects and technical tasks.
• Respond quickly and effectively to critical technical incidents.
• Identify potential improvements and proactively recommend solutions.

Skills

Windows Server

Debian Linux

Networking L2/L3

Prometheus & Grafana

Ansible

GitLab CI/CD

Bash scripting

Python scripting

HAProxy

BIND

MariaDB

PostgreSQL

LibreNMS

IT security basics

Documentation

Backups & DR

Incident response

Tools

Prometheus

Grafana

rsyslog

Fluent Bit

HAProxy

BIND

MariaDB

PostgreSQL

Job description

DataOne seeks a System Administrator to install, configure, and maintain robust IT systems and infrastructure across Windows and Linux environments. You will monitor performance, implement backups, script in Bash/Python, and automate deployments with Ansible and GitLab CI/CD.

Collaborating with the CTO and IT Infrastructure team, you will help ensure security, reliability, and scalable operations for international projects while documenting configurations and procedures.