Senior System Administrator

Insight Globals Client is seeking a Senior Systems Administrator responsible for the design, administration, security, and lifecycle management of our enterprise infrastructure environment.

This role owns the day-to-day operation and continuous improvement of our Microsoft cloud platform, on-premises infrastructure, network environment, and endpoint management solutions. The successful candidate will work closely with Security, Service Desk, and business stakeholders to maintain a secure, reliable, and compliant environment while developing practical technology roadmaps that maximize the value of existing investments before introducing new platforms or services.

This is a hands-on infrastructure role. We are seeking an individual with demonstrated operational ownership of enterprise systems, not a project-focused consultant, help desk technician, or administrator whose experience is limited to a single technology domain.

• Own and administer Microsoft 365, Entra , Intune, and Azure services, including identity, access management, endpoint compliance, and security controls.
• Develop and maintain governance standards, Conditional Access policies, licensing strategies, and lifecycle management processes.
• Lead cloud modernization initiatives while ensuring operational stability and audit readiness.

• Administer and support enterprise networking and security platforms, including Cisco, Meraki, Palo Alto, VPN connectivity, wireless infrastructure, and site-to-site communications.
• Partner with security teams to implement and maintain network segmentation, firewall policies, access controls, and monitoring capabilities.
• Serve as an escalation point for infrastructure and security incidents.

• Manage on-premises server, storage, virtualization, backup, and disaster recovery platforms.
• Maintain Windows Server environments and lead modernization efforts involving VMware and future virtualization technologies.
• Ensure infrastructure capacity, performance, resiliency, and operational health across multiple sites.

• Develop infrastructure roadmaps, standards, and lifecycle plans aligned to business requirements and budget expectations.
• Identify opportunities to improve security, reliability, and user experience through better use of existing technologies before recommending new investments.
• Support compliance, audit, and regulatory requirements through documented processes, controls, and evidence collection.

Candidates must demonstrate hands-on operational ownership in most or all of the following areas:

• Microsoft 365 administration
• Entra  Conditional Access
• Intune device management and compliance
• Azure administration and governance

• Cisco switching and routing
• Meraki wireless and network management
• Palo Alto firewalls and security policy administration
• VPN and remote connectivity solutions

• Windows Server administration
• Virtualization platforms (VMware or equivalent)
• Backup and disaster recovery solutions
• Active Directory and hybrid identity environments

• Experience operating within regulated, audited, or compliance-driven environments, including implementation of security controls, access governance, change management, disaster recovery, and audit support.

• Power Shell automation and scripting
• Microsoft Defender, Purview, and security technologies
• Multi-site or global infrastructure support experience