System Administrator

The Dinerstein Companies – Houston, TX

Overview

The Dinerstein Companies (TDC) is seeking a System Administrator to support corporate offices, construction operations, and our national property portfolio. This role is responsible for maintaining and supporting a Microsoft 365–centric environment with on-premise infrastructure, including VMware virtualization and SAN storage systems. The ideal candidate is hands-on, detail-oriented, and comfortable working across both modern cloud-based platforms and traditional IT environments. This position plays a critical role in ensuring systems are stable, secure, and scalable to support ongoing company growth.

What You’ll Do

Administer Microsoft 365 (Exchange, Teams, SharePoint, OneDrive)
Manage SharePoint file storage and permissions
Maintain Windows Servers, Active Directory, and VMware environment
Manage SAN storage systems and support backup and recovery
Troubleshoot infrastructure, systems, and M365 issues
Support escalated and backlog IT issues
Assist with system patching, hardening, and security practices
Collaborate on deployments, projects, and documentation

What You Bring

4–8 years of systems administration experience
Strong Microsoft 365 administration experience
Experience with Active Directory and Windows Server
VMware virtualization experience preferred
Experience supporting enterprise environments

Preferred Experience

Experience managing VMware and SAN storage environments in production
Familiarity with hybrid IT environments (M365 + on-prem)
Exposure to IT security and patch management practices
Experience supporting distributed environments including corporate and field/construction locations

What Success Looks Like

Stable and reliable IT systems
Well-organized and secure M365 and SharePoint environments
Proactive issue resolution
Minimal disruption to business operations

Why Join TDC

Growing organization with national portfolio
Hands-on technical role with real impact
Exposure to both modern M365 and core infrastructure systems
Collaborative IT environment focused on improvement

The Dinerstein Companies

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