---
title: 'Senior RHEL QA Infrastructure Engineer at ON.energy'
canonical: 'https://feeny.ai/job/senior-rhel-qa-infrastructure-engineer-on-energy-houston-w2kse5hyyn1v'
type: 'job'
last_seen: '2026-10-19'
---

# Senior RHEL QA Infrastructure Engineer at ON.energy

- **Company:** ON.energy
- **Location:** Houston, TX
- **Posted:** 2026-10-02
- **Last confirmed live:** 2026-10-19
- **Apply:** https://job-boards.greenhouse.io/onenergy/jobs/4431728009

## Job description

ON.energy is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center. With multiple gigawatts currently under construction, we are enabling grid-safe data centers.

## ROLE SUMMARY

We're looking for A Senior RHEL Infrastructure QA Engineer to validate the reliability, performance, and deployment integrity of our server and application infrastructure, including systems running on Red Hat Enterprise Linux (RHEL) and containerized workloads. This role sits at the intersection of QA and systems/infrastructure engineering — testing not just application behavior, but the platforms and deployment pipelines that behavior runs on, including performance under load, correct behavior across upgrades, and validation of containerized and orchestrated deployments.

## KEY RESPONSIBILITIES

- Design and execute test plans for infrastructure changes, including OS-level updates, container deployments, and platform upgrades.
- Validate server sizing and performance under load, including load, stress, and soak testing of production-bound systems.
- Test and verify containerized application deployments for correctness, resource behavior, and rollback safety.
- Build and maintain test automation and monitoring scripts to validate infrastructure health and deployment outcomes.
- Collaborate with systems, DevOps, and application engineering teams to define acceptance criteria for infrastructure changes.
- Document test results, defects, and qualification outcomes clearly for technical and non-technical stakeholders.

## KEY REQUIREMENTS

- 5+ Years of hands-on Linux administration experience, specifically with Red Hat Enterprise Linux (RHEL) — system administration, package management, service management (systemd), and shell scripting.
- Experience testing or validating containerized deployments — building, running, and troubleshooting Docker containers, and working knowledge of container orchestration fundamentals (Kubernetes or OpenShift).
- Solid QA/testing background — designing test plans and test cases, executing structured test cycles, and tracking/triaging defects to resolution.
- Experience with CI/CD pipelines and validating automated build/deployment processes (e.g. Jenkins, GitLab CI, Azure DevOps, or similar).
- Working knowledge of networking fundamentals (TCP/IP, DNS, firewalls, VPN concepts) sufficient to test connectivity, access, and security requirements.
- Scripting ability in Bash and/or Python, for building test harnesses and automating repetitive validation tasks.
- Experience with performance/load testing tools and methodology (e.g. JMeter, Locust, k6, or comparable).
- Familiarity with version control (Git) and issue tracking systems (e.g. Jira, Azure).
- Strong troubleshooting and root-cause analysis skills spanning OS, network, and application layers.
- Clear written communication — able to produce test plans, test cases, and defect/qualification reports that non-specialists can follow.

## PREFERRED EXPERIENCE

- Experience testing industrial/OT systems or SCADA platforms (e.g. Ignition, PLCs, MQTT/OPC UA) — directly relevant to our environment.
- Deeper Kubernetes/OpenShift operational experience — cluster administration, Helm charts, or similar.
- Exposure to infrastructure-as-code tooling (Ansible, Terraform).
- RHEL certification
- Experience with monitoring/observability tooling (Prometheus, Grafana, Nagios, Zabbix, or similar).
- Security testing awareness — vulnerability scanning, hardening validation, or familiarity with CIS benchmarks for RHEL.
- Experience with virtualization platforms (VMware, KVM).
- Prior experience in energy, utilities, or other critical-infrastructure/industrial sectors.
- Experience with cloud platforms (Azure, AWS), especially hybrid on-prem/cloud environments.
- Familiarity with database testing (PostgreSQL, MySQL, or similar).
- Experience with load balancers or reverse proxies (HAProxy, NGINX).

## #LI-AD1

For US-based roles - What you’ll get:

- Competitive salary + annual performance-based bonus eligibility
- Medical, dental, and vision insurance
- 401(k) with company match
- Paid time off and company holidays

For Mexico-based roles - What you’ll get:

- Competitive salary + annual performance bonus eligibility
- Christmas Bonus (Aguinaldo): 30 days
- Major medical expenses and life insurance
- Paid time off and holidays (per local policy)

For all roles:

- Professional development and growth opportunities
- Opportunity to grow with a mission-driven team shaping the future of clean energy
- Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
- Benefits vary by role and location and are subject to change.

Agency Notice: ON.energy does not accept unsolicited resumes from staffing agencies, search firms, or third-party recruiters. Resumes submitted without a fully executed Master Services Agreement (MSA) and a written request from an authorized member of our Talent Acquisition team will be considered the property of ON.energy. No placement fees or compensation will be paid for unsolicited candidate submissions.

## About ON.energy

## Company Overview
- **One-liner**: ON.energy supplies and operates hyperscale power systems built to meet the world’s most demanding resilience challenges, delivering grid-safe energy and AI infrastructure through patented technology and proprietary software.
- **Entity Type**: Private (Series B, multiple debt financing rounds)
- **Headquarters**: Miami, Florida, United States
- **Founded**: 2016
- **Founders**: Alan Cooper (CEO & Co-Founder) and Ricardo De Azevedo (CTO & Co-Founder)

## Core Business
- **Primary Industry**: Energy Technology (energy storage, battery systems, critical power infrastructure)
- **Target Customers**: AI data centers, mission-critical facilities, grid-scale asset owners (B2B, enterprise, infrastructure)
- **Mission/Purpose**: To build the backbone of energy and AI infrastructure, making energy resilient, clean, abundant and affordable while solving the toughest power problems in the world.

## Products & Services
- **Hyperscale Power Systems**: Custom, end-to-end solutions for AI data centers and mission-critical facilities, combining advanced power electronics, battery storage and proprietary control software.
- **ON.command™ Energy Management System**: Proprietary software platform for managing gigawatt-scale deployments, optimizing grid stability, energy arbitrage, and uptime.
- **AI.UPS™ Platform**: Patented microgrid control system designed to deliver flickerless, full-facility protection with up to Tier 4 performance for mission-critical facilities.
- **Battery Energy Storage Systems (BESS)**: Grid-scale and commercial & industrial storage solutions for frequency regulation, peak shaving, and renewable integration.
- **Fault-Tolerant Architectures**: Engineered solutions for the most demanding environments, built with Tier-1 components backed by 20-year warranties.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed (private company)
- **Key Metric**: Total Funding: $262.6M (across multiple debt and equity rounds, including Series B led by Ultra Capital in 2023); Annual Revenue: $4.5M (per LinkedIn estimate, likely reflective of earlier stage); 3 GW+ operating & under construction; 10+ GW production capacity
- **Notable Investors/Partners**: Ultra Capital (Series B lead), SDCL Energy Efficiency Income Trust, Lombard Odier Investment Managers, Live Oak Bank, BridgePeak Energy Capital, Pathward
- **Growth Signals**: 143% headcount growth YoY (148 employees as of 2026), 875% job posting growth YoY (52 open positions), 75+ projects across the Americas, $77.6M debt financing in January 2025

## Competitive Advantages
- **Patented Technology**: Proprietary microgrid control systems (AI.UPS) and energy management software (ON.command) that set new global benchmarks for reliability and uptime (99.9% availability).
- **FEOC Compliant & U.S. Manufacturing**: Proudly engineered and built in America, meeting foreign entity of concern compliance – a key differentiator for domestic infrastructure projects.
- **Gigawatt-Scale Supply Chain**: 10+ GW production capacity with Tier-1 components and 20-year warranties, enabling rapid deployment at scale.
- **Track Record**: Over 150 years of combined team runtime, proven performance across industrial, manufacturing, infrastructure, transportation, and grid-scale storage.

## Strategic Focus
- **Grid-Safe AI Power**: Scaling hyperscale power solutions specifically designed for AI data centers, addressing grid volatility and power quality challenges.
- **Global Deployment**: Expanding across the Americas with a fully ramped supply chain and active projects in 9 countries (US, Mexico, Argentina, Peru, Chile, Canada, etc.).
- **Vertical Integration**: Continuing to develop proprietary hardware and software in-house, from R&D to commissioning and asset management.

## Why Work Here
- **Culture**: Described as dynamic, innovative, and far from traditional corporate mold – autonomous teams with high trust, fast decision-making, and a focus on impact. “If you want predictable, this isn’t it. If you want impact, welcome.”
- **Work Environment**: Cross-functional teams spanning engineering, product, finance, and operations. Locations include Miami (HQ), Houston, Mexico City, Atlanta, and field roles across the US. Hybrid/remote flexibility likely varies by role.
- **Growth Opportunities**: Rapidly scaling company (143% headcount growth) with opportunities in supply chain, project engineering, R&D, software, and IT. Emphasis on professional growth and learning from “the brightest minds in technology, product engineering, finance, and more.”
- **Mission-Driven**: Work that directly impacts energy resilience, clean energy adoption, and AI infrastructure – a chance to solve some of the toughest power problems globally.

## Sources
1. [ON.energy Website](https://www.on.energy/)
2. [ON.energy Greenhouse Careers](https://job-boards.greenhouse.io/onenergy)
3. [ON.energy LinkedIn](https://www.linkedin.com/company/on-es)
4. [ON.energy Team Page](https://www.on.energy/team)
5. [CB Insights - On.Energy Profile](https://www.cbinsights.com/company/onenergy)

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