Senior System Administrator

About the role

Social Discovery Group is looking for a Senior System Administrator with deep expertise in Microsoft infrastructure and VDI/RDS platforms. This hands‑on position supports five data centers, multiple virtualization and storage systems, and the corporate cloud environment while collaborating closely with NOC, InfoSec, DevOps, and L2 support teams.

Key responsibilities

• Administer corporate Microsoft services: Active Directory, DNS, DHCP, Certificate Authority (PKI) and Group Policy.
• Maintain access platforms such as Atlassian Jira & Confluence, 1C/ERP, SQL Server, monitoring, backup, Google Workspace and Slack.
• Support VDI and terminal server farms, manage domain services, certificates and ensure systems are patched and documented.
• Resolve incidents and service requests within defined SLAs.
• Participate in infrastructure projects including AD domain migration, VDI farm replacement, load‑balancer stack upgrade, Windows server refresh and legacy decommissioning.
• Prepare implementation steps, build test environments and run pilots.
• Keep infrastructure documentation and inventory up to date in NetBox and Confluence.
• Take part in on‑call rotation to guarantee system availability.

Required profile

• Bachelor’s degree in Computer Science, IT or a related field.
• Minimum 5 years of experience administering Microsoft and VDI infrastructures.
• Hands‑on experience with at least one full Active Directory domain or forest migration.
• Proven experience operating VDI or terminal access platforms in production.

Required skills

• Microsoft Active Directory
• DNS, DHCP, Certificate Authority (PKI)
• Group Policy Management
• VDI and Remote Desktop Services (RDS)
• Atlassian Jira and Confluence
• 1C/ERP application
• SQL Server
• Google Workspace
• Slack
• NetBox

What we offer

• Remote‑first work environment with a globally distributed team.
• Recognition as a two‑time “Great Place to Work” winner (USA & Japan) and a Top‑5 company for work‑from‑anywhere jobs.
• Opportunities to work on cutting‑edge infrastructure projects across multiple data centers.