Senior Systems Administrator

Systems Administrator – Infrastructure

Location:

Tampa, FL

Employment Type:

Contract-to-Hire Pay: $61-66 per hour

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 , VMware, cloud infrastructure, enterprise storage, backup and disaster recovery technologies, and security platforms.

• Administer and support Microsoft Active Directory, including Group Policy, organizational units, permissions, auditing, backup, and recovery.
• Administer Microsoft Entra  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.

Candidates should have a strong background administering enterprise infrastructure environments and meet one of the following experience levels:
Bachelor'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; or High school diploma/GED and approximately 7+ years of relevant enterprise infrastructure experience.

• Relevant experience should include several of the following areas:
  Windows Server administration
• Active Directory and Group Policy
• Microsoft Entra  / Azure AD
• Microsoft 365
• VMware virtualization
• Linux administration
• Cloud infrastructure
• Enterprise storage
• Backup and disaster recovery
• Systems security
• Infrastructure monitoring
• Systems integration
• Scripting and automation
• Basic enterprise networking and troubleshooting

Strong preference will be given to candidates with experience in several of the following:

• 8+ years of enterprise systems administration experience
• VMware vSphere / ESXi administration
• VMware NSX
• VMware Workspace ONE
• Microsoft Azure administration
• Microsoft Entra  Exchange administration
• AWS administration
• Red Hat Enterprise Linux Enterprise SAN and SAN fabric administration
• Enterprise backup platforms
• Advanced Power Shell or other scripting experience
• Server hardware and virtual environment capacity planning
• Enterprise disaster recovery planning
• Security compliance and vulnerability management
• Supporting highly available or 24/7 technology environments
• Red Hat Certified Systems Administrator (RHCSA) or similar technical certifications are a plus.

• Strong troubleshooting and root-cause analysis skills
• Ability to independently manage systems and technical assignments
• Strong understanding of enterprise infrastructure architecture
• Ability to quickly learn unfamiliar technologies
• Strong documentation and technical communication skills
• Ability to manage multiple priorities in a mission-critical environment
• Strong attention to security, availability, reliability, and data integrity
• Ability to collaborate…