Jobs → Operations → Senior Systems Administrator

About the Role Our client is seeking an experienced Senior Systems Administrator to design, secure, maintain, and optimize enterprise cloud and infrastructure environments. This role offers the opportunity to provide technical leadership, resolve complex infrastructure issues, and support strategic IT initiatives. Key Responsibilities • Administer and optimize Windows Server, virtualization, cloud infrastructure, identity services, storage, and enterprise applications • Manage firewalls, switches, wireless networks, VPNs, and secure connectivity • Handle patching, monitoring, performance tuning, system hardening, and Tier 3 escalation support • Troubleshoot complex system, network, and cloud infrastructure issues • Implement security controls aligned with CMMC/NIST requirements, including access management, logging, vulnerability remediation, and risk assessments • Develop scripts and automation to improve operational efficiency • Maintain technical documentation, support infrastructure projects, and mentor junior administrators Requirements • Strong hands-on experience with Microsoft 365 (M365), Azure, Entra ID, Exchange, and VMware in a 100% SaaS environment • Solid networking fundamentals, including the ability to monitor firewalls, pull logs, and troubleshoot connectivity issues • Experience with CMMC and security compliance requirements • Strong communication, collaboration, problem-solving, and interpersonal skills • 7+ years of systems administration or infrastructure experience • Strong Windows Server, VMware/Hyper-V, Azure/AWS, networking, and scripting skills (PowerShell, Bash, or Python) • Microsoft Certified: Azure Administrator Associate (AZ-104) & CompTIA Security+ or a higher-level security certification • Bachelor’s degree • Palo Alto firewall experience is a plus as the organization transitions to Palo Alto • Cultural fit is a key consideration