Senior Systems Administrator

Active Directory (Mid-Level)

• Design, implement, and administer AD forests, domains, sites, and services.
• Create and manage AD Sites and Services, including new site/subnet configurations.
• Manage GPOs, OU structure, DNS/DHCP integration, replication, and AD health.
• Configure DHCP failover and create DHCP scopes.
• Configure and troubleshoot DFS and Start Menu redirection.

Server & Infrastructure Operations (Expert-Level)

• Perform server administration, OS installations, patching, and vulnerability remediation.
• Troubleshoot OS and application issues.
• Manage patching, performance monitoring, and server hardening.
• Oversee backups, disaster recovery drills, and incident response.
• Ensure compliance with IT security policies and industry standards.

Exchange / M365 Administration

• Manage, configure, and maintain Exchange / M365 Environment.
• Handle mailbox provisioning, transport rules, mail flow and troubleshooting.
• Ensure high availability, backup, DR, and migration readiness.

5–10 years of experience in enterprise server administration.

Strong technical expertise in:

• • Active Directory (Sites & Services, FSMO roles, DNS, DHCP, GPOs)
  • Server & Infrastructure Operations (installation, troubleshooting, patching)
  • Exchange Server / M365 Administration.

Good understanding of authentication and federation (ADFS, SSO, PKI).

Excellent troubleshooting, analytical, communication, and documentation skills.