Senior System Administrator

About the role

We are looking for an experienced Senior System Administrator to join our IT department and drive the continued enhancement of our infrastructure. You will be responsible for the reliability, security, and performance of our server, network, and datacenter environments.

Key responsibilities

• Manage and monitor datacenter operations, server infrastructure, and network environments to ensure high availability.
• Supervise the Operations team, assign schedules, coordinate resources, and ensure timely task completion.
• Design, implement, and maintain system infrastructure solutions aligned with business needs and IT best practices.
• Monitor network security, system integrity, server deployments, and user access controls.
• Administer Microsoft Exchange 2016, including mailbox management, OWA, SSL certificates, and public certificates.
• Support hybrid Exchange environments, Office 365 migrations, SharePoint administration, and email troubleshooting.
• Manage mail security and flow solutions such as Barracuda and Proofpoint.
• Administer Active Directory, DNS, DHCP, Group Policies, and user permissions on Windows Server.
• Configure and manage Hyper‑V virtual environments, monitor host performance, and maintain virtual machines.
• Perform backup and recovery operations using Veeam Backup and Symantec Backup Exec.
• Coordinate with external vendors, consultants, and internal stakeholders for infrastructure projects.

Required profile

• Bachelor's degree in IT, Computer Science, Computer Engineering, or related field.
• Microsoft certifications (MCSA, MCSE, Microsoft 365) preferred.
• Minimum 5 years of experience in system administration or infrastructure management.
• Strong troubleshooting, analytical, and problem‑solving abilities.
• Excellent communication and coordination skills across technical and business teams.

Required skills

• Microsoft Exchange 2016
• Office 365 and hybrid Exchange environments
• SharePoint administration
• Active Directory, DNS, DHCP, Group Policies
• Windows Server administration
• Hyper‑V virtualization (including VMM)
• Veeam Backup
• Symantec Backup Exec
• Barracuda mail security
• Proofpoint mail flow solutions