Senior Systems Administrator - Windows & Linux Expert

Valiant Technologies LLC; Minneapolis (MN); On-site; USD 90,000 - 120,000; Full time

Job summary

Valiant Technologies LLC in Minneapolis is seeking an experienced System Administrator to manage and secure enterprise IT infrastructure, ensuring high availability and performance. The role requires hands-on work with Windows Server (2016/2019/2022), Linux (RHEL/Ubuntu/CentOS), AD, DNS, DHCP, LDAP, and virtualization (VMware/Hyper-V).

Candidates should be proficient in PowerShell and Bash, familiar with cloud (AWS/Azure/GCP), monitoring (SolarWinds, Nagios, Zabbix, Prometheus), and backup

Qualifications

• 5+ years of experience in System Administration or IT Infrastructure.
• Strong Windows/Linux administration and practical AD/DNS/DHCP/GPO experience.
• Familiarity with virtualization and cloud platforms.

Responsibilities

• Install, configure, and maintain Windows and Linux server environments.
• Monitor performance, availability, and security; manage incident responses.
• Administer Active Directory, security groups, and Group Policy.
• Patch, upgrade, and harden servers; manage backups and DR procedures.
• Support hybrid cloud infrastructure and collaborate with network/security teams.

Skills

System administration

Troubleshooting

Automation

Cross-functional collaboration

Security best practices

Education

Bachelor's degree in Computer Science or related field

Master's degree preferred

Tools

Windows Server

Linux (RHEL/Ubuntu/CentOS)

Active Directory

DNS

DHCP

LDAP

VMware vSphere/ESXi

Hyper-V

PowerShell

Bash

Cloud (AWS/Azure/GCP)

SolarWinds

Nagios

Zabbix

Prometheus

Veeam

Commvault

Windows Server Backup

Intune

SCCM

GPO

VPN

Firewalls

Load balancing

ServiceNow/Jira Service Management

Job description

Valiant Technologies LLC in Minneapolis is seeking an experienced System Administrator to manage and secure enterprise IT infrastructure, ensuring high availability and performance. The role requires hands-on work with Windows Server (2016/2019/2022), Linux (RHEL/Ubuntu/CentOS), AD, DNS, DHCP, LDAP, and virtualization (VMware/Hyper-V).

Candidates should be proficient in PowerShell and Bash, familiar with cloud (AWS/Azure/GCP), monitoring (SolarWinds, Nagios, Zabbix, Prometheus), and backup