Sr. System Administrator

We are looking for a Sr. System Administrator. This is a hybrid full-time permanent hire position in RTP with our client. In this role as a Sr. System Administrator you will work independently with minimal direction, take problems from start to finish, and communicate clearly with technical teams, business leaders, and vendors. No visa sponsorship is available at this time or in future for this position.

Responsibilities as a Sr. System Administrator:

• Administer Windows and Linux servers, virtualization, and identity infrastructure on-premises and in Azure
• Design and maintain highly available systems that meet uptime, performance, and recovery targets for 24×7 retail operations
• Migrate server workloads from the on-premises data center to Azure with the Cloud team, including sizing, cutover, and decommissioning
• Maintain build, configuration, and hardening standards for servers and cloud resources
• Administer Microsoft Entra ID and hybrid identity, including directory sync and license management
• Design a roles, permissions, and Privileged Identity Management (PIM) approach that works across the company
• Build and tune Conditional Access policies, including token protection, with the Information Security team
• Bring applications onto single sign-on through Entra ID
• Administer Microsoft 365: Exchange Online, Teams, SharePoint, and OneDrive
• Set up and maintain email security with the Information Security team, including SPF, DKIM, DMARC, and anti-phishing and anti-spam policies
• Manage Microsoft Intune policies, compliance, and configuration for corporate and Entra-joined devices
• Keep backups healthy, run scheduled restore and failover tests, and maintain the disaster recovery and business continuity plan for the data center and Azure.
• Patch servers and remediate findings from vulnerability scanning, managed detection and response, and audits on timelines agreed with the Information Security team
• On-call rotation and support critical issues and scheduled maintenance after hours and on weekends as needed
• Work with the Information Security team on changes that strengthen company security posture
• Handle the system administration tasks the Information Security team assigns during incidents and investigations, such as gathering logs, isolating systems, and restoring service.
• Maintain the system controls and evidence that support PCI DSS and other compliance requirements
• Apply least-privilege access, secure configuration, and logging standards across all systems
• Work with the Information Security and Software Development teams to design secure operating environments and data flows
• Automate repetitive, time-intensive tasks with PowerShell, Microsoft Graph, Azure Automation, and infrastructure-as-code
• Support the Infrastructure, Network, Security, Application Development, AI, and Service Desk teams with the system and identity work they depend on
• Maintain system documentation, runbooks, and architecture diagrams
• Manage vendor relationships for support, renewals, upgrades, and purchases, and provide input on budget and licensing

Required skills and qualifications as a Sr. System Administrator:

• 10+ years of hands-on system administration experience in an enterprise environment
• 3+ years administering Microsoft Azure infrastructure in production
• Expert knowledge of Windows Server, Active Directory, DNS, DHCP, and Group Policy, plus working knowledge of Linux
• Deep experience with Microsoft 365, Entra ID, Conditional Access, and Intune
• Experience with VMware or Hyper-V virtualization
• Hands-on experience with backup, disaster recovery, and business continuity testing
• Strong PowerShell scripting and automation skills, including Microsoft Graph
• Working knowledge of networking fundamentals: TCP/IP, DNS, routing, firewalls, VPN, and load balancing
• Solid understanding of system hardening, patch management, and least-privilege access
• Experience supporting security incident response and root cause analysis for major outages
• Experience with ITIL-based change, incident, and problem management, and with Jira and Confluence or similar tools
• Clear written and verbal communication, including explaining technical issues to non-technical leaders.
• Ability to work independently, prioritize competing demands, and deliver quality work under pressure
• Bachelor’s degree in Information Technology, Computer Science, or a related field, or equivalent experience