SCADA Engineer - Energy Management Systems

ON.energy; Houston (TX); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Salary bonus

Medical insurance

401(k) with match

Paid time off

Professional development

Job summary

ON.energy is seeking a SCADA Engineer to own the core configuration of our SCADA platform in Ignition, focusing on tag structures, UDT setup, and device connections. You will support the HMI and controls teams by building tools that speed SCADA configuration and deployment across battery energy storage systems and grid-connected assets.

You will design MQTT-based communication, integrate with PLCs using Modbus, OPC UA, and DNP3, and contribute to architecture reviews for reliability and

Qualifications

• Bachelor's degree or equivalent practical experience in a related engineering field.
• 2–5 years hands-on experience with Ignition including tag configuration, UDT setup, device connections, and scripting.
• Experience with MQTT, Modbus TCP/RTU, OPC UA, or DNP3 is required.
• Experience building or maintaining scripts/tools for SCADA configuration, deployment, or validation.
• Strong troubleshooting and clear written/verbal communication skills.

Responsibilities

• Configure and maintain SCADA tags, UDTs, and device connections in Ignition for scalable multi-site use.
• Design and maintain MQTT-based communication and broker configuration for SCADA integration with Ignition.
• Integrate SCADA with PLCs and field devices across BESS and grid topologies using MQTT, Modbus, OPC UA, and DNP3.
• Develop tools to support the HMI and controls teams, including automated UDT/tag generation and validation utilities.
• Provide support for commissioning, alarm validation, and system testing across development and production environments.
• Document SCADA standards, tag maps, MQTT structures, and historian integrations for long-term maintainability.

Skills

Troubleshooting

Documentation

Communication

Scripting

Technical curiosity

Education

Bachelor's degree in Electrical Engineering, Controls Engineering, Computer Engineering, or related field

Tools

Ignition

MQTT

Modbus TCP/RTU

OPC UA

DNP3

Job description

SCADA Engineer - Energy Management Systems

Houston, Texas, United States

ON.energyis 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.energydevelops projects worldwide that set new benchmarks for resilience.

The EMS team is looking for a SCADA Engineer to own the core configuration of our SCADA platform inIgnition, primarily tag structures, UDT setup, and communication with field devices. This person willsupport 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 energystorage 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.
• 2 - 5 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.

#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
• 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.