Senior Systems Administrator – Windows, Linux & Cloud

Quantum Technologies. LLC; Minneapolis (MN); On-site; USD 70,000 - 110,000; Full time

Job summary

Quantum Technologies. LLC is seeking an experienced System Administrator to manage and support our enterprise IT infrastructure. You will maintain Windows and Linux server environments, administer AD, DNS/DHCP, and GPO, and support virtualization with VMware/Hyper‑V.

The role requires scripting in PowerShell or Bash, plus familiarity with cloud platforms and backup/recovery strategies. The ideal candidate has 5+ years of hands-on experience, strong troubleshooting skills, and the ability to

Qualifications

• 5+ years of experience in System Administration, IT Infrastructure, or Server Administration.
• Strong hands-on experience with Windows Server and Linux administration.
• Practical experience managing Active Directory, DNS, DHCP, and Group Policy.
• Experience with virtualization technologies such as VMware or Hyper-V.
• Knowledge of server monitoring, troubleshooting, backup, and disaster recovery.
• Experience with PowerShell or Bash scripting for automation.
• Understanding of networking fundamentals and enterprise infrastructure security.
• Exposure to cloud platforms and hybrid infrastructure environments is preferred.
• Strong analytical, troubleshooting, and problem-solving skills.
• Ability to manage multiple technical priorities and collaborate with cross-functional teams.

Responsibilities

• Install, configure, manage, and maintain Windows and Linux server environments.
• Monitor system performance, availability, resource utilization, and infrastructure health.
• Administer Active Directory, user accounts, security groups, and Group Policy configurations.
• Perform routine server patching, upgrades, maintenance, and security updates.
• Manage virtualization environments using VMware and Hyper-V.
• Configure and troubleshoot DNS, DHCP, network connectivity, and server-related issues.
• Implement backup, recovery, and disaster recovery procedures.
• Automate repetitive administrative tasks using PowerShell and Bash scripting.
• Monitor system logs, investigate incidents, and resolve infrastructure-related problems.
• Implement security policies, access controls, and system hardening procedures.
• Support cloud-based infrastructure and hybrid IT environments.
• Collaborate with network engineers, security teams, developers, and IT support personnel.
• Maintain system documentation, configuration records, and operational procedures.
• Provide technical support for production systems and participate in incident management.

Skills

Windows Admin

Linux Admin

Active Directory

GPO

DNS‑DHCP

LDAP

VMware/Hyper-V

PowerShell

Bash

Cloud (AWS/Azure/GCP)

System Monitoring

Backup & DR

Networking

Endpoint management

Security hardening

Education

Bachelor's degree in Computer Science / IT / CE

Master's degree in IT / Systems Administration / Cybersecurity (preferred)

Certifications like Windows Server Hybrid, RHCSA, CompTIA Server+, VCP (advantage)

Tools

SolarWinds

Nagios

Zabbix

Prometheus

Job description

Quantum Technologies. LLC is seeking an experienced System Administrator to manage and support our enterprise IT infrastructure. You will maintain Windows and Linux server environments, administer AD, DNS/DHCP, and GPO, and support virtualization with VMware/Hyper‑V.

The role requires scripting in PowerShell or Bash, plus familiarity with cloud platforms and backup/recovery strategies. The ideal candidate has 5+ years of hands-on experience, strong troubleshooting skills, and the ability to