Senior Systems Administrator - Windows Server, VMware & SQL

Pinnacle99 Inc.; New York (NY); On-site; USD 100,000 - 140,000; Full time

Job summary

Pinnacle99 Inc. is seeking a Senior Systems Administrator to manage and secure our on-premises IT infrastructure. The role emphasizes Windows Server environments, VMware virtualization, SQL Server, and core enterprise services in a fully onsite setting.

The ideal candidate will have hands-on experience across monitoring, backups, DR, and security, with strong troubleshooting and collaboration skills to support business-critical systems and end-user needs.

Qualifications

• 4+ years hands-on experience administering Windows Server environments.
• 4+ years managing VMware virtualization environments.
• Strong knowledge of Windows Server 2016, 2019, and 2022.
• Experience with VMware ESXi and vSAN; familiarity with versions 8.x and 9.x.
• Experience administering Microsoft SQL Server, including SQL Server 2016, 2019, and 2022.
• Networking: AD, DNS, DHCP, TCP/IP.
• Experience supporting Microsoft 365, Exchange, and enterprise apps.
• Knowledge of backup/recovery, patching, and security best practices.
• Strong troubleshooting and communication skills.

Responsibilities

• Install, configure, maintain, and troubleshoot Windows Server environments.
• Administer and maintain VMware virtualization infrastructure (ESXi, vSAN).
• Administer Microsoft SQL Server (2016, 2019, 2022).
• Manage Microsoft 365, Exchange, and other business-critical apps.
• Monitor server performance, availability, and health; respond to incidents.

Skills

Windows Server

VMware

Microsoft SQL Server

Active Directory

Group Policy

DNS

DHCP

TCP/IP

Microsoft 365

Exchange

PowerShell

Backups/DR

Troubleshooting

Documentation

Tools

VMware ESXi

vSAN

Windows Server Management Tools

Job description

Pinnacle99 Inc. is seeking a Senior Systems Administrator to manage and secure our on-premises IT infrastructure. The role emphasizes Windows Server environments, VMware virtualization, SQL Server, and core enterprise services in a fully onsite setting.

The ideal candidate will have hands-on experience across monitoring, backups, DR, and security, with strong troubleshooting and collaboration skills to support business-critical systems and end-user needs.