Role Description The Sr. Controls Engineer – OT SCADA Projects leads the design, configuration, commissioning, and support of plant control systems for utility-scale solar, storage, and hybrid renewable energy projects. This engineer works with minimal oversight, applies expert knowledge of grid functionality and Utility/ISO standards, mentors junior engineers, and contributes to product standards. Approximately 80% of this role is project execution, while up to 20% is continuous improvement and product development. Responsibilities - Project Execution & Technical Delivery (~80%) - Lead end-to-end controls design for utility-scale solar, BESS, and hybrid projects – from initiation through commissioning and closeout. - Program and commission SEL controllers using AcSELerator; develop control logic in Codesys using IEC 61131-3 structured text. - Identify project-specific deviations from standard product scope during contracting, forecast and scope project-specific development work. - Implement and validate closed-loop Active Power and Reactive Power, AVR and PFR Algorithms. - Maintain version control for all code artifacts according to established version control procedure. - Troubleshoot complex SCADA and controls issues using Wireshark, breakpoints, cross-reference, and watch list tools. - Produce project deliverables: System Architecture Diagrams, Control Narratives, Logic Diagrams, commissioning documents, and operator manuals. - Product & Process Improvement (~20%) - Contribute to new feature development and bug fixes in collaboration with the Product Engineering team. - Review documentation prepared by junior controls engineers (technical and non-technical). - Lead the Continuous Improvement and Lessons Learned program, feed field insights back into product standards and templates. - Coach junior engineers through FAT preparation and customer-facing presentation. - Stakeholder Communication & Collaboration - Serve as primary controls technical contact for EPCs, asset owners, and grid operators through project execution, FAT, and commissioning. - Lead FATs as formal presentations; communicate to non-technical audiences with supporting materials prepared in advance. - Flag technical risks and schedule pressures to management with context and proposed solutions. - Maintain Jira tickets daily with thorough detail; enforce Jira best practices with junior engineers. Expectations & Success Indicators - Deliver high-quality work independently across multiple concurrent projects with ownership and urgency. - Leverage standardized platforms and tools; avoid project-specific one-off engineering approaches. - Ensure 100% adherence to Terabase quality processes; enforce standards with junior engineers. - Mentor junior controls engineers through technical guidance, code review, and FAT coaching. - Project deliverables completed on time, within scope, and meeting Utility/ISO regulatory standards. - Jira, version control, and documentation consistently maintained without follow-up from management. - Recognized internally and externally as the go-to technical authority on Terabase SCADA and OT controls. - Travel up to 10% for on-site commissioning, FAT, and customer engagements. Qualifications - Bachelor’s degree in Engineering, Computer Science, Technology, or related field. - 3-5+ years of IEC 61131-3/PLC programming experience, preferably in Codesys or AcSELerator environment. - 3+ years of utility-scale power plant controls experience (solar, BESS, or hybrid). Requirements - Expert IEC 61131-3 programming; primary tooling is AcSELerator (SEL controllers) and Codesys, including Diagram Builder, traces, breakpoints, and watch lists. - Extensive knowledge of industrial protocols: Modbus-TCP, DNP3, OPC-UA, etc. - Expert knowledge of grid functionality: PFR, AVR, Reactive Power, Voltage Regulation, and Capacitor Banks – including the underlying grid rationale, not just controller behavior. - Proficiency with Utility/ISO testing and interconnection requirements (ERCOT, PJM, BPA, IEEE 2800, NERC, etc.). - Experience with Power Plant Controller (PPC) design, configuration, and commissioning. - Familiarity with PSCAD, PSSE, and/or TSAT modeling processes for utility-scale sites. Benefits - Generous time off and holiday policy. - Remote flexibility. - Flexible time off. - Comprehensive benefits package. - Career progression. - 401k match. - Stock options. - Home office set up allowance. - And much more!