Windows System Administrator

Apt; Birmingham (AL); On-site; USD 70,000 - 100,000; Full time

Job summary

Apt is seeking a skilled IT Systems Administrator to design, implement, and support enterprise virtualization and Windows infrastructure in Birmingham, AL. You will manage VMware vSphere and Hyper-V environments, Active Directory, DNS, PKI, and server OS lifecycles while driving automation via PowerShell.

Strong collaboration with cybersecurity, networking, and application teams is required to maintain security, uptime, and compliance across the organization.

Qualifications

• Experience administering VMware vSphere and Hyper-V environments across ESXi, vCenter, HA/DRS, and live migration.
• Experience managing Active Directory, DNS, PKI, and Group Policy in enterprise settings.
• Proficiency in Windows Server 2019/2022/2025 administration and server lifecycle management.

Responsibilities

• Administer, maintain, and support VMware vSphere environments, including ESXi hosts, vCenter Server, HA, DRS, vMotion, and VM lifecycle management.
• Administer and support Microsoft Hyper-V infrastructure, including failover clustering, live migration, virtual switches, and VM provisioning.
• Manage and maintain Microsoft Active Directory services, including user accounts, security groups, OUs, and GPOs.
• Install, configure, patch, and support Windows Server operating systems in physical and virtual environments.
• Manage core Microsoft infrastructure services, including DNS, PKI, and file/print services.
• Provision, monitor, optimize, and troubleshoot virtual machines across VMware and Hyper-V platforms.
• Perform system upgrades, migrations, and infrastructure modernization with minimal service disruption.
• Implement and maintain server hardening, security controls, and compliance requirements.
• Monitor system performance, availability, and capacity for enterprise infrastructure.
• Manage backup, recovery, and DR solutions for server and virtualization environments.
• Troubleshoot and resolve server, virtualization, authentication, storage, and network connectivity issues.
• Support high-availability and business continuity solutions to meet uptime requirements.
• Develop and maintain technical documentation, architecture diagrams, procedures, and inventories.
• Automate administrative tasks using PowerShell and scripting tools.
• Collaborate with cybersecurity, networking, and application teams to ensure secure service delivery.
• Conduct root cause analysis for incidents and implement corrective actions to prevent recurrence.

Skills

PowerShell scripting

Automation

System administration

Virtualization

Security/compliance

Documentation

Tools

VMware vSphere/ESXi/vCenter

Hyper-V

Active Directory

Windows Server administration

DNS/PKI

Storage (SAN)

Backup solutions

Server monitoring

Job description

• Administer, maintain, and support VMware vSphere environments, including ESXi hosts, vCenter Server, HA, DRS, vMotion, and virtual machine lifecycle management.
• Administer and support Microsoft Hyper-V infrastructure, including failover clustering, live migration, virtual switches, and virtual machine provisioning.
• Manage and maintain Microsoft Active Directory services, including user accounts, security groups, organizational units (OUs), and Group Policy Objects (GPOs).
• Install, configure, patch, and support Windows Server operating systems in physical and virtual environments.
• Manage core Microsoft infrastructure services, including DNS, Certificate Services (PKI), and file and print services.
• Provision, monitor, optimize, and troubleshoot virtual machines across VMware and Hyper-V platforms.
• Perform system upgrades, migrations, and infrastructure modernization initiatives with minimal service disruption.
• Implement and maintain server hardening, security controls, and compliance requirements in accordance with organizational standards.
• Monitor system performance, availability, and capacity to ensure optimal operation of enterprise infrastructure.
• Manage backup, recovery, and disaster recovery solutions for server and virtualization environments.
• Troubleshoot and resolve server, virtualization, authentication, storage, and network connectivity issues.
• Support high-availability and business continuity solutions to meet organizational uptime requirements.
• Develop and maintain technical documentation, architecture diagrams, operational procedures, and system inventories.
• Automate administrative and maintenance tasks using PowerShell and other scripting tools.
• Collaborate with cybersecurity, networking, and application teams to ensure secure and reliable service delivery.
• Conduct root cause analysis for system incidents and implement corrective actions to prevent recurrence.

Required Skills & Technologies

• VMware vSphere, ESXi, vCenter Server, HA, DRS, vMotion, and vSAN.
• Microsoft Hyper-V, Failover Clustering, Live Migration, and Hyper-V Manager.
• Microsoft Active Directory Domain Services (AD DS).
• Windows Server 2019/2022/2025 administration.
• Group Policy Management and domain administration.
• DNS, PKI/Certificate Services.
• PowerShell scripting and automation.
• Storage technologies (SAN) and enterprise backup solutions.
• Server monitoring and performance management tools.
• Experience with cybersecurity best practices, vulnerability remediation, and system hardening.