Senior Systems Administrator

Senior Systems Administrator – InfrastructureLocation: Tampa, FLEmployment Type: Contract-to-HirePay: $61-66 per hourPosition Overview: We are seeking an experienced Senior Systems Administrator – Infrastructure to support a large, mission-critical public-sector technology environment in the Tampa area. This individual will be responsible for the administration, reliability, security, and availability of enterprise infrastructure supporting 24/7 operations. The environment includes Windows and Linux systems, Active Directory, Microsoft 365, Azure/Entra ID, VMware, cloud infrastructure, enterprise storage, backup and disaster recovery technologies, and security platforms. The ideal candidate is a hands-on infrastructure professional who can independently troubleshoot complex issues, take ownership of systems and projects, and work effectively across both traditional on-premises and cloud environments.Key ResponsibilitiesAdminister and support Microsoft Active Directory, including Group Policy, organizational units, permissions, auditing, backup, and recovery.Administer Microsoft Entra ID and Identity and Access Management (IAM) technologies.Maintain and support Microsoft 365 and enterprise email environments.Provide administration and operational support for Microsoft Azure cloud infrastructure.Configure and support AWS and other cloud environments as required.Administer VMware virtual environments, including VMware vSphere/ESXi.Support Windows Server 2019+ and enterprise Linux environments, including Red Hat.Administer enterprise storage technologies, including SAN, NFS, and Fibre Channel environments.Support enterprise backup, recovery, and disaster recovery technologies.Administer enterprise security technologies including SIEM, endpoint protection, anti-virus/anti-malware, and Mobile Device Management (MDM) platforms.Install, configure, troubleshoot, upgrade, patch, and maintain enterprise servers, applications, and supporting infrastructure.Monitor infrastructure availability, utilization, performance, and capacity using enterprise monitoring tools.Perform routine security audits, compliance reviews, and vulnerability scans.Create and maintain custom scripts to automate system administration and operational tasks.Create and manage Group Policy Objects (GPOs).Perform root-cause analysis for major incidents and recurring infrastructure problems.Build and deploy software packages using enterprise software distribution tools.Maintain accurate physical and virtual hardware/software inventories.Maintain detailed system configuration, technical process, and operational documentation.Participate in infrastructure, security, cloud, and systems integration projects.Evaluate new technologies, vendor products, and services.Manage and resolve infrastructure-related incidents and requests through an enterprise ticketing system.Collaborate with infrastructure, network, security, application, and other technology teams.Participate in a rotating on-call schedule as required.Support occasional after-hours maintenance, emergency response, or system recovery activities.Required QualificationsBachelor's degree in a technical field and approximately 5+ years of relevant enterprise systems administration experience;Associate degree in a technical field and approximately 6+ years of relevant experience; orHigh school diploma/GED and approximately 7+ years of relevant enterprise infrastructure experience.Relevant experience should include several of the following areas:Windows Server administrationActive Directory and Group PolicyMicrosoft Entra ID / Azure ADMicrosoft 365VMware virtualizationLinux administrationCloud infrastructureEnterprise storageBackup and disaster recoverySystems securityInfrastructure monitoringSystems integrationScripting and automationBasic enterprise networking and troubleshootingPreferred Qualifications8+ years of enterprise systems administration experienceVMware vSphere / ESXi administrationVMware NSXVMware Workspace ONEMicrosoft Azure administrationMicrosoft Entra ID and Exchange administrationAWS administrationRed Hat Enterprise LinuxEnterprise SAN and SAN fabric administrationEnterprise backup platformsAdvanced PowerShell or other scripting experienceServer hardware and virtual environment capacity planningEnterprise disaster recovery planningSecurity compliance and vulnerability managementSupporting highly available or 24/7 technology environmentsSkills & CompetenciesStrong troubleshooting and root-cause analysis skillsAbility to independently manage systems and technical assignmentsStrong understanding of enterprise infrastructure architectureAbility to quickly learn unfamiliar technologiesStrong documentation and technical communication skillsAbility to manage multiple priorities in a mission-critical environmentStrong attention to security, availability, reliability, and data integrityAbility to collaborate effectively with technical teams, management, vendors, and business stakeholdersAdditional Requirements: This position supports a public-sector environment and will require successful completion of an extensive pre-employment background screening process. Candidates must be comfortable working onsite in Tampa during the initial onboarding period. The position is expected to transition to a hybrid schedule thereafter, with the specific timeframe and onsite/remote schedule to be determined. Occasional travel to other local facilities and participation in an on-call rotation may be required. Kavaliro provides Equal Employment Opportunities to all employees and applicants. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Kavaliro is committed to the full inclusion of all qualified individuals. In keeping with our commitment, Kavaliro will take the steps to assure that people with disabilities are provided reasonable accommodations. Accordingly, if reasonable accommodation is required to fully participate in the job application or interview process, to perform the essential functions of the position, and/or to receive all other benefits and privileges of employment, please respond to this posting to connect with a company representative.