Senior Controls Engineer

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.  We’re looking for a  Senior Controls  Engineer  with  project-based engineering experience  to lead network-and-controls-related hardware product design, documentation, project-specific technical compliance and support the development activities related to these products. This is  a product focused role —we need someone who can speak fluently about both  network architecture and industrial control systems , ideally have experience  in mission critical applications , and interface with IT, software, project, commissioning and O&M engineering teams.   Key Responsibilities:  Support the business development team by  providing technical proposals e.g. network diagrams  that meet the customer’s needs. Collaborate across  control systems, SCADA, and IT teams  to ensure complete and secure connectivity Integrate and support industrial protocols like  Modbus, DNP3, and OPC-UA Compile product technical information packages  for the project engineering team. Co-lead review and validation  of  network/controls product-related topics  during the project execution phase.  Maintain technical documentation including  as-built drawings Support product development by capturing design improvement feedback  from the different project phases: design, commissioning and O&M. Support product development by recommending design approaches and vendors  of the main equipment. Participate in product design sprints with the development team. Participate in the product’s commissioning phase .   Required Experience Bachelor’s degree in Controls Engineering, Electronics Engineering, or similar technical field. 8 + years  of hands-on  controls engineering experience  in project-based or industrial settings. Proven experience in  project network deployments , not just operations Strong grasp of protocols (TCP/IP, BGP, OSPF, VLANs, VPNs) Familiarity with  control systems and operational technology (OT) Ability to produce and read  network and control architecture drawings Excellent communication skills across technical and non-technical teams. Willing to travel up to 20% for product FAT inspection and site commissioning witnessing.   Preferred Experience Certifications:  ISA CAP/CCST, Rockwell, Siemens, Schneider  or similar Experience with  BESS, SCADA, EMS ,  Safety Systems  or utility-scale infrastructure Background in energy, utility, or data center environments   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. Benefits vary by role and location and are subject to change. Agency Notice:   ON.energy does not accept unsolicited resumes from staffing agencies, search firms, or third-party recruiters. Resumes submitted without a fully executed Master Services Agreement (MSA) and a written request from an authorized member of our Talent Acquisition team will be considered the property of ON.energy. No placement fees or compensation will be paid for unsolicited candidate submissions.