Senior Systems Administrator

Role summary / purpose Responsible for installing, configuring, and maintaining computing infrastructure, operating systems, and/or middleware products on all computer platforms, including mainframes, workstations, servers, and web servers, in support of 24x7 business processes. The Senior Systems Administrator is responsible for the administration, security, reliability, and continuous improvement of enterprise identity and infrastructure services. Key responsibilities • Evaluate, implement, and modify operating system software parameters and/or product solutions for optimal performance • Identify integration and other interface requirements for all supported products and platforms • Ensure cybersecurity measures, automation, and operational efficiency • Lead enterprise-wide IT infrastructure projects, including data center operations, cloud migrations, and IT automation initiatives • Oversee virtualization platforms, network infrastructure, and enterprise-level Active Directory environments • Implement IT governance frameworks, cybersecurity measures, and IT policy development for compliance and best practices • Administer identity and infrastructure services with hands-on expertise in Active Directory, Microsoft Entra ID, SSO application integrations, ADFS, DNS, DHCP, and PKI/certificate services • Ensure compliance with cybersecurity policies and industry regulations Requirements – education & experience • Bachelor's degree in Computer Science, Information Technology, or a related field • 11-15 years of experience managing enterprise IT environments, system architecture, and infrastructure security Required skills • Advanced expertise in Active Directory and Microsoft Entra ID • Advanced troubleshooting and PowerShell automation skills • Experience with AWS, Azure, and cloud-based infrastructure solutions • Experience with VMware and virtualization platforms • DevOps and networking expertise • Cybersecurity risk management and high-availability IT architecture • Experience supporting hybrid identity, authentication, and access management Nice-to-have / preferred skills • Working understanding of Azure Local, Rubrik, Dell infrastructure, and Zerto • Experience with SSO application integrations and ADFS • Experience with DNS, DHCP, and PKI/certificate services