Senior Systems Administrator

Senior Systems AdministratorWe are seeking a highly skilled and forward-thinking Senior Systems Administrator to serve as a key technical leader within the IT department. This position is responsible for the design, implementation, administration, and continuous improvement of the company's network, cloud, server, virtualization, and Microsoft technology environments.The Senior Systems Administrator will have a strong focus on Microsoft Azure, Microsoft 365, enterprise networking, virtualization, Windows Server, and hybrid infrastructure platforms. This role will work closely with the Desktop Support Analyst and Junior Systems Administrator, serving as a senior escalation resource, technical mentor, and subject matter expert (SME) for complex infrastructure and systems-related issues.The Senior Systems Administrator will lead infrastructure modernization initiatives, develop and maintain technical standards, drive complex infrastructure projects, and help ensure the reliability, security, scalability, and performance of the company's technology environment.This position will also play a key role in infrastructure integration and modernization associated with company acquisitions, including network architecture, identity integration, server and application migrations, security alignment, and standardization of acquired environments.Infrastructure Architecture & Engineering:Design, implement, and maintain enterprise network architecture utilizing Aruba, Meraki, and Fortinet technologies.Own and maintain network standards including VLAN design, IP addressing, routing, redundancy, and segmentation.Configure and support Fortinet firewalls, including HA, SD-WAN, site-to-site VPNs, and remote access solutions.Manage Aruba switching and wireless environments, including centralized management via Aruba Central.Lead network expansion and modernization projects across warehouse and office environments.Validate vendor designs and implementations to ensure alignment with company standards and best practices.Cloud & Microsoft Platform:Serve as the Azure subject matter expert, leading cloud architecture decisions and hands-on implementation.Design and manage Azure Virtual Machines, networking, and supporting services.Architect and maintain hybrid identity solutions integrating on-premises Active Directory with Microsoft Entra ID.Lead improvements to the Microsoft 365 environment, including Exchange Online, SharePoint, Teams, Intune, and security configurations.Virtualization & Server Infrastructure:Design, manage, and support virtualization platforms including VMware vSphere and Microsoft Hyper-V.Maintain virtual machine lifecycle including provisioning, performance optimization, and capacity planning.Support and maintain Windows Server environments and supporting infrastructure services.Plan and execute server migrations from on-premises environments to Azure or modern platforms.Manage storage, backup, and disaster recovery strategies for virtual and physical infrastructure.Infrastructure Integration & Modernization:Participate in infrastructure planning and integration for company acquisitions, including:Network connectivity and architectureActive Directory and identity integrationServer and application migrationsSecurity alignment and standardizationIdentify opportunities to modernize legacy infrastructure and move toward cloud or hybrid solutions.Security & Reliability:Partner with IT leadership to strengthen the organization's security posture across network, cloud, and server platforms.Assist with investigation and remediation of security or infrastructure incidents.Implement monitoring, alerting, and performance visibility across core infrastructure platforms.Technical Leadership & Collaboration:Act as the highest escalation point for complex technical issues beyond desktop and junior systems administration scope.Mentor and provide technical guidance to the Junior Systems Administrator and Desktop Support Analyst.Establish and maintain infrastructure documentation, standards, and operating procedures.Collaborate with vendors, consultants, and internal stakeholders on infrastructure initiatives.Provide technical planning input, timelines, and risk assessments for infrastructure projects.