SCADA Engineer - Energy Management Systems

ON.energy; Houston (TX); On-site; USD 110,000 - 150,000; Full time

Benefits offered by this job

Competitive salary

Performance-based bonus eligibility

Healthcare: medical, dental, vision

401(k) with company match

Paid time off and holidays

Job summary

ON.energy is seeking a SCADA Engineer in Houston to own core Ignition configuration, tag structures, and UDTs while supporting HMI and controls teams. You will design MQTT-based communications, integrate PLCs, and build automation tools for scalable SCADA deployment across battery energy storage systems and grid-connected assets.

The role emphasizes troubleshooting, documentation, and continuous improvement of SCADA architecture, with growth opportunities in OT, DMZ, and cloud environments.

Qualifications

• Bachelor’s degree in Electrical Engineering, Controls Engineering, Computer Engineering, or related field.
• 2-5 years of hands-on Ignition experience: tag configuration, UDTs, device connections, scripting.
• Experience with MQTT, Modbus TCP/RTU, OPC UA, or DNP3.
• Experience building or maintaining scripts/tools for SCADA configuration, deployment, or validation.
• Strong troubleshooting across software and field hardware.

Responsibilities

• Configure and maintain SCADA tags, UDTs, and device connections in Ignition across sites.
• Design and maintain MQTT-based communication and broker configuration for SCADA.
• Integrate SCADA with PLCs and field devices using MQTT, Modbus, OPC UA, DNP3.
• Build tools to support HMI and controls teams (UDT/tag generation, configuration templates, data validation).
• Troubleshoot SCADA and communications in development and production; support commissioning and testing.

Skills

Ignition configuration

UDT setup

Tag management

Device integration

MQTT

Modbus TCP/RTU

OPC UA

DNP3

Scripting

Education

Bachelor’s degree in Electrical Engineering or related field

Tools

Ignition Vision/Perspective

SQL databases

Azure DevOps

Job description

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
• 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 [e-mail]
• 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.