Controls Engineer

<div class="content-intro"><p>ON.energy<span class="Apple-converted-space">&nbsp;</span>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.&nbsp;With multiple gigawatts currently under construction, we are enabling grid-safe data centers.&nbsp;</p></div><p>Location: Atlanta area is preferred. Role will require travel to projects sites.</p> <p>Role Summary<br>The Controls Engineer is responsible for deploying, configuring, and supporting control systems for utility-scale Battery Energy Storage System (BESS) projects. This role is central to commissioning success, ensuring reliable operation and integration of Siemens PLC-based control systems with EMS, PCS, BMS, protection systems, and site networks.</p> <p>Key Responsibilities<br>Deploy, configure, and support Siemens PLC-based control systems for BESS projects<br>Support commissioning activities including system bring-up, integration testing, and site acceptance testing (SAT)<br>Troubleshoot PLC logic, communications, and I/O issues during commissioning and early operations<br>Integrate PLCs with EMS, PCS, BMS, protection relays, meters, and SCADA systems<br>Support communication protocols such as Modbus TCP/RTU, IEC 61850 (as applicable), and other OT interfaces<br>Collaborate closely with Network Engineers, Deployment Engineers, EMS teams, and Field Commissioning teams<br>Support factory acceptance testing (FAT) and field commissioning activities<br>Assist with developing standardized PLC configurations, templates, and commissioning procedures<br>Review and validate control system documentation, drawings, and as-built configurations<br>Travel to project sites during deployment and commissioning phases as required</p> <p>Required Experience &amp; Skills<br>Hands-on experience with Siemens PLC platforms (TIA Portal, S7-1500 / S7-1200 or similar)<br>Experience commissioning or supporting industrial control systems in the field<br>Strong understanding of PLC-based control architectures and OT systems<br>Experience integrating PLCs with external systems (EMS, SCADA, PCS, BMS, protection)<br>Ability to troubleshoot across controls, networking, and software boundaries<br>Comfortable working in fast-paced commissioning environments with time pressure<br>Willingness to travel to project sites during deployment and commissioning</p> <p>Preferred Experience<br>Experience with utility-scale BESS, power generation, renewables, or substation environments<br>Familiarity with EMS platforms and grid-interactive systems<br>Experience supporting commissioning teams on live sites<br>Understanding of cybersecu