ON.energyis 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.

The EMS team is looking for a SCADA Engineer to own the core configuration of our SCADA platform in Ignition, primarily tag structures, UDT setup, and communication with field devices. This person will support the HMI team and the controls team by developing tools that speed up SCADA configuration, deployment, and ongoing support of our current and evolving SCADA solution across battery energy storage systems (BESS) and grid connected assets.

KEY RESPONSIBILITIES

Configure and maintain SCADA tags, UDTs (User Defined Types), and device connections in Ignition, ensuring aconsistent and scalable foundation across sites.

Design and maintain MQTT based communication for SCADA, including broker configuration, topic structure,and integration with Ignition.

Integrate SCADA systems with PLCs and other field devices across BESS and grid connected inverter topologies,using protocols such as MQTT, Modbus TCP/RTU, OPC UA, and DNP3.

Build and maintain tools that support the HMI team, such as automated UDT and tag generation, configurationtemplates, and data validation utilities.

Build and maintain tools that support the controls team, such as scripts for point checkout, configurationcomparison, and deployment automation.

Identify and implement improvements to the efficiency, performance, and reliability of the current SCADAconfiguration and deployment process as it continues to develop and scale.

Troubleshoot SCADA and communication issues in both development and live production environments,including field support as needed.

Support commissioning activities, including point to point checkout, alarm validation, and system testing.

Document SCADA configuration standards, tag maps,



and MQTT topic structures to support long termmaintainability.

Participate in the ongoing development of company alarm management and SCADA standards.

Design and maintain scalable SCADA architectures across OT, DMZ, and Cloud environments, including Ignition

Gateway Network, Remote Tag Providers, MQTT infrastructure, and historian integrations.

Participate in architecture reviews and propose improvements that increase system reliability, maintainability,and scalability.

Analyze and optimize SCADA performance, including tag execution rates, historian throughput, Gateway

Network traffic, database performance, MQTT publish rates, and overall system resource utilization.

Perform root cause analysis for latency, communication bottlenecks, and data quality issues across distributedSCADA systems.

Design, configure, and validate redundant SCADA architectures, including Ignition redundancy, redundant MQTTbrokers, historian failover, and communication resiliency.

Execute disaster recovery and failover testing procedures to ensure high system availability.

Design and maintain historical data strategies using Ignition Tag Historian and SQL databases.

Optimize historian storage, retention policies, data compression, and historical query performance.

REQUIREMENTS

Bachelor's degree in Electrical Engineering, Controls Engineering, Computer Engineering, or a related field, orequivalent practical experience.

3+ years of hands on experience with Ignition, including tag configuration, UDT setup, device connections, and scripting.





Experience with the Vision or Perspective modules is a plus but not the focus of this role.

Working knowledge of industrial communication protocols such as MQTT, Modbus TCP/RTU, OPC UA, or DNP3.

Experience building or maintaining scripts or tools that support configuration, deployment, or validation ofSCADA systems.

Strong troubleshooting skills across both software and field level hardware issues.

Clear written and verbal communication skills, with the ability to document technical work for both technicaland non technical audiences.

PREFERRED

Understanding of PLC based control systems and the ability to read and interpret control logic.

Familiarity with Siemens PLC platforms.

Experience with battery energy storage systems (BESS) or renewable energy assets.

Experience with SQL databases and historian systems.

Familiarity with Azure DevOps or similar work tracking tools for engineering documentation and issuemanagement.

Knowledge of alarm management standards such as ISA 18.2.

Bilingual in English and Spanish is a plus, given cross functional coordination with regional teams.

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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

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.

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📌 SCADA Engineer - EMS (Xico)
🏢 On.Energy
📍 Xico