Systems Administrator

Located in San Antonio, TX

Systems Administrator

Location: San Antonio, TX (Onsite)
Company: Express Employment Professionals – NW San Antonio
Employment Type: Contract to Hire

About Us

Our client is a growing Managed Services Provider delivering enterprise-level IT support and strategic technology solutions to small and mid-sized businesses. As a Microsoft and Cisco-focused organization, we specialize in secure, scalable infrastructure solutions that drive business performance and reliability for our clients.

We are seeking a Systems Administrator who excels in managing Microsoft environments while maintaining foundational networking knowledge to support Cisco-based infrastructure when needed.

Position Summary

The Systems Administrator is primarily responsible for the administration, maintenance, optimization, and support of Microsoft-based server and cloud environments across multiple client infrastructures. This role focuses on systems reliability, performance, security, and lifecycle management.

Network administration responsibilities are secondary and support-oriented, assisting with troubleshooting and maintaining Cisco network infrastructure as needed.

Primary Responsibilities – Systems Administration

• Administer and maintain Windows Server environments (2016/2019/2022)
• Manage Active Directory, Group Policy, DNS, and DHCP
• Administer and support Microsoft 365 (Exchange Online, Teams, SharePoint, OneDrive)
• Manage Azure / Entra ID environments including user provisioning and identity security
• Configure and maintain virtualized environments (VMware and/or Hyper-V)
• Perform patch management, upgrades, and system lifecycle planning
• Monitor system performance and proactively resolve issues
• Manage backup and disaster recovery solutions
• Implement and maintain cybersecurity best practices
• Participate in infrastructure upgrades, migrations, and cloud transitions
• Document client environments and maintain technical standards
• Provide Tier II / Tier III support and escalation handling

Secondary Responsibilities – Network Administration Support

• Assist with configuration and troubleshooting of Cisco switches, routers, and firewalls
• Support VLAN configuration and network segmentation
• Troubleshoot connectivity issues (VPN, routing, DNS resolution)
• Assist with firewall rule management and security policies
• Collaborate on network upgrades and deployments
• Support WAN/LAN infrastructure maintenance

Required Qualifications

• 3+ years of Systems Administration experience (MSP experience preferred)
• Strong hands-on experience with Microsoft Server environments
• Experience administering Microsoft 365 and Azure
• Experience with virtualization platforms (VMware or Hyper-V)
• Working knowledge of Cisco networking equipment
• Strong understanding of TCP/IP, DNS, DHCP, VLANs, and VPNs
• Experience with backup and recovery platforms
• Strong troubleshooting and documentation skills
• Ability to manage multiple client environments simultaneously

Preferred Certifications

• Microsoft (AZ-104, MS-102, or equivalent)
• Cisco CCNA
• CompTIA Network+ or Security+
• VMware VCP (preferred)

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