Senior Network & Systems Administrator

Senior Network & Systems AdministratorThis is a full-time position based on-site at Hard Rock Stadium in Miami Gardens, FL.Responsibilities:Enterprise Infrastructure & Systems Administration:Administer, maintain, and optimize enterprise infrastructure, including DHCP, DNS, TCP/IP, Active Directory, Azure AD, Microsoft 365, virtualization, storage, and cloud environments.Manage Active Directory, Group Policy, and Single Sign-On (SSO) platforms, including Okta.Configure, deploy, administer, and support Windows Server, Linux, Windows, and macOS operating systems.Maintain and administer Cisco networking infrastructure, including routing, switching, and wireless environments.Manage Microsoft 365 services, including Exchange Online, Teams, OneDrive, and Azure Active Directory.Design, implement, and support distributed network environments across multiple facilities.Oversee VMware vSphere and other virtualization platforms to ensure optimal server performance and availability.Administer enterprise storage solutions (SAN/NAS) and maintain backup and disaster recovery systems.Manage JAMF Mobile Device Management (MDM) to ensure macOS devices remain compliant with organizational policies and security standards.Administer NAC SolutionSecurity & Compliance:Monitor enterprise systems to ensure compliance with organizational cybersecurity standards and applicable regulatory requirements, including PCI-DSS and HIPAA, where applicable.Ensure servers remain current with operating system patches, firmware updates, antivirus definitions, and security best practices.Collaborate with cybersecurity teams to strengthen cloud security, identity management, and endpoint protection.Participate in vulnerability remediation, disaster recovery planning, business continuity initiatives, and incident response efforts.Operational Support:Monitor enterprise system health and performance to maximize uptime and reliability.Execute system maintenance, upgrades, and change management procedures with minimal operational disruption.Troubleshoot and resolve complex infrastructure, network, and server issues.Provide infrastructure support for game day operations, concerts, Formula 1 events, tennis tournaments, and other stadium events.Develop and maintain comprehensive technical documentation, including system configurations, procedures, change management records, and recovery plans.Leadership & Service Delivery:Supervise and mentor the Systems Specialist and Help Desk Technician, ensuring high-quality technical support and professional development.Oversee Help Desk operations, ensuring service requests are acknowledged within established service level expectations.Collaborate with cross-functional departments and technology partners to deliver reliable and secure technology solutions.Identify opportunities to improve infrastructure performance, automation, security, and operational efficiencies.Qualifications:Bachelor's degree in Information Technology, Computer Science, or a related field, or an equivalent combination of education and experience.Minimum of five (5) years of progressively responsible experience in enterprise systems administration, networking, and infrastructure support.Strong experience administering:Microsoft Active Directory and Group PolicyAzure Active Directory / Microsoft Entra IDMicrosoft 365 (Exchange Online, Teams, OneDrive)VMware vSphere or comparable virtualization platformsWindows Server and Linux environmentsCisco networking technologies (routing, switching, wireless)Enterprise storage (SAN/NAS)Identity management and Single Sign-On (Okta preferred)Experience with backup, disaster recovery, and business continuity solutions.Working knowledge of Layer 2 and Layer 3 networking protocols.Experience supporting both Windows and macOS environments.Strong analytical, troubleshooting, organizational, and documentation skills.Excellent written, verbal, and interpersonal communication skills.Featured Benefits:Medical, dental, and vision insuranceLife insurance (including voluntary coverage for spouses and children)Long term disability insuranceTicket benefits for events including Miami Dolphins games, the Formula 1 Crypto.com Miami Grand Prix, and the Miami OpenEmployee gym, subsidized lunch program, and discounts on a variety of products and services401k, paid time off (PTO), and company holidays