We are seeking a highly skilled and experienced Systems Administrator to manage and optimize our hybrid IT environment, including Citrix infrastructure, on-premise systems, cloud services (AWS and Azure), and internal user support. This role requires a hands-on technical expert with knowledge in Citrix XenApp, Windows Server administration, virtualization technologies, and automation scripting. The ideal candidate will provide technical leadership, tier III support, and contribute to a high-performing IT infrastructure that enables business operations across a global workforce.

Key Responsibilities

Serve as the technical subject matter expert for Citrix environments (XenApp, XenDesktop, Metaframe, EdgeSight, StoreFront, Web Interface, Receiver/Client Plugins), managing operations, troubleshooting, and performance optimization across enterprise deployments.
Manage Citrix policies, SSL VPN configurations, and multi-factor authentication (2FA) solutions.
Monitor and resolve complex issues in the Citrix environment and related application infrastructure; serve as the escalation point for troubleshooting across various IT components.
Administer core Microsoft infrastructure services (Active Directory, Group Policy, DNS, DHCP, File/Print) and Windows Server platforms (2012 through 2022).
Deploy, configure, and maintain physical and virtual servers in VMware vSphere environments, including high availability, disaster recovery, and storage management (SAN, vSAN, Nimble).
Support cloud infrastructure initiatives in AWS and Azure, including deployment, monitoring, and optimization of application stacks, networking, and storage.
Automate system administration and operational tasks using PowerShell and Python, including integration with REST APIs.
Provide Tier III technical support for end-user issues and mentor Tier I/II support staff; participate in an on-call rotation for critical incident response.
Ensure IT operations run smoothly across local and global teams, supporting workstations, conference rooms, and IT assets in collaboration with Workplace Services.
Manage IT ticket queues and document incident resolutions, standard operating procedures, and system configurations.
Support IT onboarding by provisioning user accounts, assigning permissions, and setting up new hardware/software for incoming employees.
Lead or consult on IT projects involving upgrades, new technology rollouts, and business system enhancements.
Perform capacity planning, performance tuning, and continuous infrastructure optimization.
Maintain compliance with software patching schedules, backup policies, and security standards.
Coordinate with external vendors and service providers to support infrastructure and resolve issues.

Requirements

5+ years of experience in system administration.
Advanced knowledge of Citrix technologies, Windows Server environments, Active Directory, and GPO management.
Strong experience in VMware vSphere/ESXi environments and enterprise storage systems.
Proficiency in PowerShell and Python for automation; experience integrating with REST APIs.
Solid understanding of cloud infrastructure (AWS and Azure), virtualization, and networking fundamentals.
Demonstrated ability to manage and optimize complex IT environments, both on-premise and cloud-based.
Experience in mentoring IT support teams and managing escalated tickets.
Excellent communication skills and a collaborative mindset to support cross-functional initiatives.
Proven ability to document procedures, configurations, and workflows clearly.
Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent experience).
Relevant certifications (e.g., Citrix Certified Associate/Professional, Microsoft, VMware, AWS/Azure) are a plus.