Systems Administrator

System Administrator

MasTec Communications Group is a leading national infrastructure construction company operating throughout the United States. MasTec Communications Group performs both wireline and wireless communication services on a national scale. We are seeking a skilled and proactive System Administrator with expertise in Red Hat Enterprise Linux (RHEL), VMware ESXi virtualization, automation scripting, and foundational networking.

Responsibilities As a System Administrator, you will be responsible for maintaining, securing, and optimizing our Linux-based infrastructure while supporting virtualized environments and ensuring reliable system performance and connectivity. In addition, you will:

• Install, configure, and maintain RHEL systems across physical and virtual environments
• Administer VMware ESXi hosts and vSphere environments
• Develop and maintain automation workflows for RHEL systems using tools such as Ansible, Bash, and Python to enhance system reliability and operational efficiency
• Automate network infrastructure tasks using Ansible, Python, NETCONF/YANG, and CLI scripting
• Create scripts and utilize APIs to integrate systems and extract actionable data for cross-functional automation and reporting
• Monitor system performance and ensure availability and reliability
• Apply OS patches and upgrades regularly; update administrative tools and utilities
• Troubleshoot hardware, software, and network issues in a timely manner
• Implement and enforce system security policies and procedures
• Maintain comprehensive documentation for system configurations, procedures, and troubleshooting
• Collaborate with network and security teams to ensure seamless integration and compliance
• Configure and maintain BIND DNS and KEA DHCP
• Understanding of enterprise backup solutions
• Participate in on-call rotation and respond to incidents as required
• Perform other duties as assigned by management

Qualifications About You:

• Proven experience as a Linux System Administrator, preferably with RHEL
• Hands-on experience with VMware ESXi and vSphere
• Basic understanding of networking concepts (TCP/IP, DNS, DHCP, VLANs, firewalls)
• Proficiency in scripting languages such as Bash and Python for automation
• Strong problem-solving and communication skills
• Ability to work independently and as part of a team
• You are Red Hat Certified System Administrator (RHCSA) or higher
• You have a VMware Certified Professional (VCP) certification
• Experience with configuration management tools (e.g., Ansible, Puppet)
• Familiarity with Docker containers
• Exposure to cloud platforms (AWS, Azure) is a plus
• Must have, or be able to obtain, and maintain a valid New Mexico state driver's license, have an excellent driving record and be insurable under the Company's insurance policy

MasTec, Inc. is an equal employment opportunity employer. The Company's policy is not to unlawfully discriminate against any applicant or employee on the basis of race, color, sex, sexual orientation, gender identity, religion, national origin, age, disability, genetic information, military status, or any other consideration made unlawful by applicable federal, state, or local laws. The Company also prohibits harassment of applicants and employees based on any of these protected categories. It is also MasTec's policy to comply with all applicable state, federal and local laws respecting consideration of unemployment status in making hiring decisions.