IT Systems Administrator-Level 4 - Lead (15+ Years)
About The Position
We are seeking a highly skilled Hybrid Infrastructure Administrator to manage, maintain, and modernize enterprise infrastructure across on-premises and cloud environments. The role supports the reliability, security, scalability, and performance of infrastructure used for critical business operations, and includes designing, implementing, and supporting solutions that integrate on-premises systems with cloud services. The position covers traditional systems administration—including servers, virtualization, networking, storage, Active Directory, and firewall management—as well as hybrid cloud administration across AWS, GCP, Azure, and related services. It also contributes to infrastructure modernization through VMware, automation, Infrastructure as Code (IaC), DevOps practices, vendor management, and project delivery. The role is based at GXA - GEXA Energy LP in Houston, Texas, with a standard 8 a.m.–5 p.m. schedule, eight hours per day and 40 hours per week. Driving is not required. The assignment is eligible for worker furlough; typical furloughs coincide with select national holidays and may change.
Requirements
- 15+ years, as indicated in the supplied job title.
- Strong expertise supporting enterprise on-premises infrastructure, including Windows Server, Linux, Active Directory, DNS, DHCP, storage, virtualization, and networking technologies.
- Hands-on experience administering VMware virtualization technologies.
- Experience administering and supporting hybrid cloud environments, including AWS, GCP, and Azure.
- Experience designing, deploying, and maintaining cloud infrastructure, networking, security controls, and monitoring solutions.
- Understanding of cloud networking, identity management, security, monitoring, backup, and disaster recovery concepts.
- Experience with IaC tools such as Terraform, AWS CloudFormation, ARM/Bicep, Ansible, Pulumi, or similar technologies.
- Proficiency in scripting and automation using PowerShell, Bash, Python, or similar languages.
- Strong knowledge of network configuration and management, including firewall administration.
- Experience with SonicWall and Palo Alto firewalls.
- Knowledge of storage solutions including Isilon, Vblock, VxRail, Data Domain, and Avamar.
- Excellent troubleshooting, analytical, and problem-solving skills.
- Ability to work independently and collaboratively within a team environment.
- Strong organizational, communication, and documentation skills.
- Experience managing third-party vendors and service providers.
- Demonstrated project management experience, including planning, execution, and delivery of infrastructure initiatives.
- Ability to communicate technical concepts effectively to technical and non-technical audiences.
- Proactive, self-motivated attitude and commitment to continuous learning and improvement.
Nice To Haves
- Strong expertise in VMware, infrastructure automation, IaC, vendor management, and project delivery.
- Experience implementing IaC and DevOps practices in enterprise environments.
- Experience with CI/CD pipelines and automation frameworks.
Responsibilities
- Administer, maintain, and troubleshoot on-premises Windows and Linux server infrastructure.
- Manage and configure network components to support performance, reliability, and security.
- Configure firewall rules to maintain a secure network environment.
- Monitor system health and maintain the availability and performance of critical resources.
- Perform server operating system upgrades and manage vendor patching.
- Collaborate with the IT team to design, implement, and maintain VMware virtualized environments.
- Administer and support hybrid cloud environments, including AWS, GCP, Azure, and related services.
- Design, deploy, and maintain cloud infrastructure, networking, security controls, and monitoring solutions.
- Develop and implement automation scripts and IaC solutions to streamline system administration and provisioning.
- Administer Active Directory, domain controllers, and Group Policy.
- Manage third-party vendors and service providers.
- Plan, execute, and deliver infrastructure initiatives.
- Support enterprise infrastructure including Windows Server, Linux, Active Directory, DNS, DHCP, storage, virtualization, and networking technologies.
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What This Job Offers
Career Level
Senior
Education Level
No Education Listed
