Software & Controls Engineer - PLC/SCADA

Software & Controls Engineer - PLC/SCADAON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world's leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we're scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future. At ON.energy, the Software & Controls Engineer is responsible for the design, development, testing, integration, and commissioning of control software and automation systems that ensure the reliable, efficient, and safe operation of energy storage systems and power infrastructure projects. This role bridges software engineering, control systems, and field deployment, working closely with internal engineering teams, project management, vendors, and clients to deliver high-performance control and SCADA solutions that meet safety, regulatory, and operational requirements. Key Responsibilities Design, model, and implement control algorithms and control strategies for energy storage systems and power infrastructure. Contribute to system architecture discussions and define control strategy requirements and functional specifications. Design, develop, and maintain PLC, HMI, and embedded/control software for energy storage and distributed energy systems. Configure, integrate, and maintain SCADA systems for BESS and power infrastructure projects. Write clean, efficient, maintainable, and well-documented code following best practices. Build automation scripts, testing tools, simulation environments, and continuous integration pipelines. Implement version control, software documentation, and CI/CD workflows. Collaborate with electrical, mechanical, firmware, and field service teams to ensure full system functionality and seamless integration. Support the selection, configuration, and integration of control hardware, including controllers, relays, meters, and network devices. Conduct Factory Acceptance Tests (FATs) and Site Acceptance Tests (SATs). Diagnose and resolve issues related to control logic, real-time execution, PLC/SCADA behavior, and system performance, both remotely and on-site. Ensure compliance with cybersecurity requirements and relevant standards and codes (e.g., UL, IEEE, NFPA). Support installation, commissioning, field deployments, and ongoing operational troubleshooting. Interface with clients, vendors, and internal stakeholders to provide technical documentation, training, and ongoing support. Requirements Bachelor's degree in Electrical Engineering, Controls, Software Engineering, or a related field, or equivalent experience. Strong object-oriented programming skills (e.g., C++, C#, Python, or similar). Hands-on experience with Siemens PLC programming (TIA Portal). Experience with Ignition SCADA, including HMI development and system integration. Experience developing PLC, HMI, and control software for industrial or energy systems. Familiarity with control algorithms, real-time systems, and industrial automation concepts. Knowledge of industrial communication protocols (e.g., Modbus, OPC UA, Profinet). Experience with version control systems and structured software development practices. Ability to troubleshoot control systems both remotely and on-site. Willingness to travel for commissioning and field deployments, including travel to the United States ON.energy Standards & ExcellenceTime ManagementEngineers are expected to make thoughtful estimates by understanding the scope of work, breaking tasks into manageable pieces, and setting realistic timelines. Good time management is about planning well and executing reliably, while maintaining a high bar for quality. Keeping CommitmentsWe value follow-through. Meeting commitments to deadlines, deliverables, teammates, and clients' helps build trust and keeps projects moving smoothly. When priorities or circumstances change, open communication is key. QualityWe take pride in delivering high-quality work. From PLC logic to SCADA configurations and automation tools, deliverables should be clean, maintainable, well-documented, and easy for others to build upon. Planning work realistically helps ensure quality remains strong even under time pressure. CommunicationChallenges and unexpected issues are a normal part of complex projects. We encourage proactive communication when risks or blockers arise so plans can be adjusted and the team can respond effectively. Early visibility helps everyone succeed. AutonomyEngineers are encouraged to take ownership of their work and approach challenges with curiosity and initiative. Making an effort to explore solutions independently before reaching out helps conversations be more productive and collaborative. Autonomy here means ownership, not working alone. What Sets You ApartProblem Identification:Excellent engineers look beyond task completion. They proactively identify inefficiencies, technical debt, integration risks, or system weaknesses and communicate them clearly. Recognizing problems early is a high-value contribution. Solution Orientation:Strong engineers assess the scope and complexity of issues and respond appropriately implementing quick fixes when feasible or proposing structured solutions for larger efforts. Good judgment, ownership, and constructive action are expected. Client Orientation:Everything we build serves an internal stakeholder or an external client. Excellent engineers think continuously about usability, reliability, and long-term maintainability. The mindset shifts from "completing tasks" to "delivering value." Standards are the floor, not the ceiling.Consistently meeting them builds trust. Pursuing excellence shapes the direction of our systems, our projects, and our company. 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 recruitment@onenergystorage.com Benefits vary by role and location and are subject to change.