System Administrator / Expert / Onsite in Denton

A well-established organization in the Denton, TX area is seeking a Systems Administrator IV to join its IT Infrastructure team on a full-time contract basis. This onsite role focuses on enterprise Windows administration, virtualization, Active Directory, cloud technologies, and infrastructure automation. The ideal candidate will play a critical role in maintaining highly available systems, strengthening security posture, and supporting large-scale infrastructure initiatives across a complex enterprise environment.
This is an excellent opportunity for a senior-level infrastructure professional who enjoys solving complex technical challenges and taking ownership of critical systems. You'll serve as a key escalation resource, drive modernization efforts, and influence infrastructure standards while working alongside security, networking, and engineering teams. If you're looking for a role that offers exposure to enterprise-scale technologies, automation projects, and strategic infrastructure improvements, this position provides significant technical impact and growth potential.
Contract Duration: 12+ Months Required Skills & Experience

• 7+ years of experience in Systems Administration, Infrastructure Engineering, or a related technical role
• Advanced administration experience with Windows Server environments
• Strong knowledge of Active Directory, Group Policy, DNS, DHCP, and file services
• Experience supporting VMware vSphere/ESXi or similar virtualization platforms
• Knowledge of server patching, hardening, vulnerability remediation, and security best practices
• Experience deploying and supporting endpoint security solutions such as CrowdStrike
• PowerShell scripting and infrastructure automation experience
• Strong troubleshooting skills across server, operating system, and application layers
• Experience documenting system configurations, operational procedures, and technical standards
• Ability to perform root cause analysis and resolve complex enterprise infrastructure issues

Desired Skills & Experience

• Experience supporting Linux servers in mixed operating system environments
• Exposure to public cloud platforms such as Microsoft Azure
• Experience leading server migrations, infrastructure upgrades, and modernization projects
• Familiarity with storage, backup, and disaster recovery technologies
• Knowledge of network infrastructure including TCP/IP, VLANs, DNS, firewall technologies, and certificates
• Experience with infrastructure monitoring and performance management tools
• Understanding of security frameworks such as NIST, CIS, or CMMC
• Microsoft, VMware, Red Hat, Security+, or related industry certifications
• Experience mentoring junior administrators and serving as a technical escalation point
• Bachelor's degree in Information Technology, Computer Science, or a related field preferred

What You Will Be Doing Tech Breakdown

• 50% Windows Server Infrastructure
• 20% VMware Virtualization
• 15% Security, Compliance & CrowdStrike Administration
• 10% PowerShell Automation & Scripting
• 5% Linux & Cloud Infrastructure

Daily Responsibilities

• 75% Hands On
• 10% Management Duties
• 15% Team Collaboration

Applicants must be currently authorized to work in the US on a full-time basis now and in the future.