Senior Systems Administrator — Cloud, Networking & Security

Avondale Dealerships; Grapevine (TX); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Medical insurance

Dental

Vision

Life insurance

401K Retirement Plan

Paid Holidays/Vacation/Paid Time Off

Employee Assistance Program

Job summary

Avondale Dealerships seeks a Senior Systems Administrator to design, implement, and manage dealership IT systems across Windows/Cisco/Webex environments. The role ensures secure, reliable operations with virtualization and cloud support.

The candidate will lead AD/DNS/DHCP, network infrastructure, UC platforms, and disaster recovery, while maintaining security patches and documentation.

Qualifications

• Bachelor’s degree in IT or CS from an accredited institution.
• Minimum five years related IT experience or training.
• Experience designing and administering Windows Server, AD, DNS/DHCP.
• Strong networking with Cisco switches/routers/firewalls.
• Experience with AWS cloud and virtualization technologies.

Responsibilities

• Serves as a senior-level resource for design, implementation, and ongoing administration of IT systems.
• Administers Windows Server environment, AD, DNS/DHCP, file/print, and virtualization.
• Manages Cisco network infrastructure across dealership locations.
• Administers Cisco Webex Calling/Meetings and related UC platforms.
• Plans upgrades, patches, and migrations with minimal business disruption.
• Monitors performance and proactively resolves issues.
• Implements data backup, disaster recovery, and business continuity procedures.
• Maintains security, including firewalls and patching.
• Installs and troubleshoots hardware/software; provides escalated support.
• Sets up new users on phones, voicemail, and business software.
• Maintains AWS cloud resources, provisioning, monitoring, and cost optimization.
• Keeps detailed network diagrams, configurations, licensing, and SOPs.

Skills

Windows Server

Active Directory

Group Policy

DNS/DHCP

Virtualization

Cisco networking

Cisco Webex

Cloud computing

Data backup

Security patches

Education

Bachelor’s degree in Information Technology or Computer Science

Tools

AWS

Cisco devices

Windows Server virtualization

Job description

Avondale Dealerships seeks a Senior Systems Administrator to design, implement, and manage dealership IT systems across Windows/Cisco/Webex environments. The role ensures secure, reliable operations with virtualization and cloud support.

The candidate will lead AD/DNS/DHCP, network infrastructure, UC platforms, and disaster recovery, while maintaining security patches and documentation.