System Administrator

We are looking for a skilled and proactive System Administrator to join our IT infrastructure team. The successful candidate will be responsible for managing, maintaining, and optimizing enterprise server and infrastructure environments, ensuring high availability, security, and operational continuity across the organization. The role requires strong technical expertise in Windows/Linux administration, virtualization, backup solutions, cloud services, automation, and enterprise infrastructure operations.

Key Responsibilities

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.

Required Qualifications

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.

Interested candidates should send their CV to the e-mail address in the Apply for job button with the subject line:  “System Administrator”