Systems Administration

• Administer and maintain Windows Server environments including Active Directory, DNS, DHCP, Group Policy, IIS, and File Server services.
• Manage Linux systems including RHEL, CentOS, and Ubuntu environments.
• Maintain identity management, access control, and enterprise system configurations.

Virtualization & Infrastructure

• Design, deploy, and manage VMware infrastructure including ESXi, vCenter, HA, DRS, and vMotion.
• Ensure scalability, resource optimization, and high availability of virtual environments.
• Support infrastructure expansion, migrations, and system upgrades.

Cloud & Collaboration

• Administer Microsoft 365 services including Azure AD, Exchange Online, Teams, and SharePoint.
• Support hybrid identity integration, MFA, and Conditional Access policies.
• Maintain cloud connectivity and collaboration platform availability.

Backup & Disaster Recovery

• Implement and manage Veeam Backup & Replication solutions.
• Perform backup verification, restoration testing, and disaster recovery operations.
• Ensure compliance with RPO/RTO requirements and business continuity standards.

Security & Compliance

• Apply system hardening standards using CIS benchmarks and Microsoft security baselines.
• Manage patch management, vulnerability remediation, and infrastructure security improvements.
• Ensure alignment with ISO 27001 and NIST security standards.

Automation & Scripting

• Develop and maintain automation scripts using PowerShell, Bash, and Python.
• Automate provisioning, patching, monitoring, and reporting processes.
• Improve operational efficiency through infrastructure automation.

Monitoring & Performance

• Monitor infrastructure health using tools such as Zabbix, PRTG, Nagios, or equivalent.
• Perform performance tuning, proactive issue detection, and capacity planning.
• Ensure infrastructure stability and service availability.

Networking & Integration

• Support network services including DNS, DHCP, TCP/IP, VLANs, and VPN technologies (IPSec/SSL VPN).
• Work with firewall concepts, network segmentation, DMZ environments, and access control policies.
• Collaborate with network and security teams for infrastructure integration.

Database & Application Support

• Support PostgreSQL and MongoDB environments including backup consistency and performance monitoring.
• Assist with enterprise application deployments and infrastructure integration.

Telephony Systems

• Manage VoIP/IP Telephony systems such as 3CX ensuring service availability and QoS optimization.
• Incident & Operations Management
• Troubleshoot complex infrastructure incidents within enterprise production environments.
• Perform root cause analysis (RCA) and implement preventive solutions.
• Support ITIL-based incident, problem, and change management processes.
• Maintain technical documentation including SOPs, runbooks, and infrastructure diagrams.

• Bachelor’s degree in Information Technology, Computer Science, System Engineering, or related field.
• Minimum 4+ years of experience in enterprise system administration.
• Strong hands-on experience with:
• Windows Server (2016/2019/2022/2025)
• Active Directory, DNS, DHCP, Group Policy
• Linux systems (RHEL/CentOS/Ubuntu)
• VMware infrastructure (ESXi, vCenter, HA, DRS)
• Proven experience with:
• Backup & Disaster Recovery solutions (Veeam preferred)
• Microsoft 365 and hybrid environments
• Infrastructure migration and upgrade projects
• Solid understanding of:
• Networking fundamentals (TCP/IP, DNS, DHCP, VLANs, VPN)
• System security and hardening practices
• ISO 27001 / NIST security standards
• Practical experience handling production incidents and performance optimization.
• Scripting and automation skills using PowerShell (required), Bash and Python (preferred).

Preferred Qualifications

• Relevant certifications such as Microsoft, VMware, Linux, or cloud certifications.
• Experience with monitoring tools such as Zabbix, PRTG, and Nagios.
• Familiarity with SIEM and log management solutions.
• Experience with SAN/NAS storage technologies.
• Experience with enterprise security and compliance frameworks.

Soft Skills

• Strong analytical and troubleshooting skills.
• Ability to work under pressure and manage critical incidents.
• Effective communication and teamwork abilities.
• Proactive, detail-oriented, and solution-oriented mindset.
• Strong organizational and documentation skills.