Quality Assurance Engineer - Manual Testing

ON.energy   is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. ON recently announced a 5GW partnership, with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary software,   ON.energy   develops projects worldwide that set new benchmarks for resilience.

Role Summary

We're seeking a Quality Assurance Engineer with Manual Testing experience, to be based in Mexico, supporting our IT division's ERP systems and business applications. This role blends requirements gathering, business process analysis, and hands-on functional, regression, and integration testing for ERP modules including Finance, HR, Inventory, and Procurement. The ideal candidate will partner closely with business stakeholders, technical teams, and ERP vendors, while leading UAT efforts, validating data migrations, and providing Service Desk support to keep our ERP environment reliable and running smoothly.

Key Responsibilities 

• Gather and document business requirements from stakeholders and end users
• Conduct business process analysis to identify gaps, inefficiencies, and improvement opportunities
• Support ERP integration testing — validate data flows, interfaces, and functionality across integrated ERP modules/systems
• Design and execute functional test cases for ERP modules (e.g., Finance, HR, Inventory, Procurement) based on business requirements
• Perform regression testing after ERP patches, upgrades, or configuration changes to ensure existing functionality is unaffected
• Conduct interface/integration testing between ERP and connected third-party systems (validate data mapping, transformation, and sync accuracy)
• Plan and execute User Acceptance Testing (UAT) with business users; document test scripts, results, defects, and sign-off
• Log and track defects found during testing through resolution (using tools like JIRA, ServiceNow, Azure DevOps)
• Validate data migration accuracy during ERP upgrades or system transitions
• Act as a liaison between business users, technical teams, and ERP vendors to clarify requirements and resolve issues
• Provide Service Desk support — triage, log, and resolve tickets related to ERP systems and general IT issues
• Perform basic system administration tasks (user access, configuration checks, system health monitoring) as needed
• Train end users on new ERP functionality/processes as needed
• Escalate unresolved technical issues to appropriate teams and track through to closure

Required Skills & Qualifications:

• Experience working with ERP systems (e.g., SAP, Oracle, Microsoft Dynamics, or similar)
• Strong background in requirements gathering and business analysis
• Hands-on experience with ERP integration, functional, and regression testing
• Experience coordinating and executing UAT with business stakeholders
• Working knowledge of system administration (user accounts, permissions, basic troubleshooting)
• Experience supporting a Service Desk/helpdesk environment (ticketing tools like ServiceNow, Jira Service Management, Zendesk)
• Strong communication skills — comfortable working directly with end users and stakeholders
• Good documentation skills (requirements docs, test cases, test scripts, process maps)

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.
• Accommodations: If you need an accommodation during the application process, email [email protected]
• 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.