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
