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. Key Responsibilities: Cloud Identity & Collaboration Own and administer Microsoft 365, Entra ID, 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. Network & Security Infrastructure 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. Data Center & Systems Infrastructure 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. Technology Planning & Operational Excellence 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. Required Qualifications: Candidates must demonstrate hands-on operational ownership in most or all of the following areas: Microsoft 365 administration Entra ID and Conditional Access Intune device management and compliance Azure administration and governance Infrastructure & Networking Cisco switching and routing Meraki wireless and network management Palo Alto firewalls and security policy administration VPN and remote connectivity solutions Systems Administration Windows Server administration Virtualization platforms (VMware or equivalent) Backup and disaster recovery solutions Active Directory and hybrid identity environments Governance & Compliance Experience operating within regulated, audited, or compliance-driven environments, including implementation of security controls, access governance, change management, disaster recovery, and audit support. Preferred Qualifications: PowerShell automation and scripting Microsoft Defender, Purview, and security technologies Multi-site or global infrastructure support experience #J-18808-Ljbffr