SCADA Engineer - EMS

ON.energy; Houston, Miami, Reston (TX, FL, VA); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with company match

Paid time off and holidays

Professional development opportunities

Job summary

ON.energy is seeking a SCADA Engineer to configure and maintain Ignition-based SCADA systems across multiple sites, with focus on MQTT-based communication and integration with PLCs and field devices. You will develop tools to support the HMI and controls teams, optimize performance, and document standards.

The role involves troubleshooting, commissioning support, and contributing to scalable SCADA architectures across OT, DMZ, and Cloud environments.

Qualifications

• Bachelor's degree or equivalent practical experience.
• 3+ years of hands-on Ignition experience including tag configuration, UDT setup, device connections, and scripting.
• Experience with MQTT, Modbus, OPC UA, or DNP3 is required.
• Experience building or maintaining SCADA configuration, deployment, or validation scripts.

Responsibilities

• Configure and maintain SCADA tags, UDTs, and device connections in Ignition across sites.
• Design and maintain MQTT-based SCADA communication and broker config.
• Integrate SCADA with PLCs and field devices using MQTT/Modbus/OPC UA/DNP3.
• Build tools to support HMI/controls teams (templates, data validation utilities).
• Troubleshoot SCADA/communication issues in development and production.
• Support commissioning, alarm validation, and system testing.
• Document SCADA standards, tag maps, and MQTT structures.

Skills

Ignition SCADA

UDT setup

MQTT Protocol

Scripting

Troubleshooting

Documentation

Education

Bachelor's degree in Electrical/Controls/Computer Engineering

Tools

Ignition Vision

Azure DevOps

SQL databases

Job description

Houston, Texas, United States; Miami, Florida, United States; Reston, Virginia, United States

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.

KEY RESPONSIBILITIES

• Configure and maintain SCADA tags, UDTs (User Defined Types), and device connections in Ignition, ensuring a consistent 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, configuration templates, and data validation utilities.
• Build and maintain tools that support the controls team, such as scripts for point checkout, configuration comparison, and deployment automation.
• Identify and implement improvements to the efficiency, performance, and reliability of the current SCADA configuration 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-term maintainability.
• 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 distributed SCADA systems.
• Design, configure, and validate redundant SCADA architectures, including Ignition redundancy, redundant MQTT brokers, 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, or equivalent 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 of SCADA 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 technical and 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 issue management.
• 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.

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.