Sr. Controls Engineer - OT SCADA Projects

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.

ResponsibilitiesProject 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

RequirementsEducation & Experience

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)

Technical Skills

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

Compensation And Benefits

This role offers a base salary of $160,000 – $190,000 (DOE).

Our salary ranges are determined by role, level, and location. Within each posted range individual pay is determined (and may be greater or higher) dependent on work location and additional factors, including job-related skills, experience, and relevant education or training. Terabase offers competitive compensation along with a comprehensive benefits package including:

• 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!