Systems Administrator

Overview

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)