Staff Software & Controls Engineer

is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges delivering custom solutions for AI data centers mission-critical facilities and front-of-the-meter assets. ON recently announced a 5GW partnership with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary softwaredevelops projects worldwide that set new benchmarks for resilience.

Role Summary

The Senior Software & Controls Engineer is a recognized subject matter expert responsible for the architecture design development and technical leadership of control software and automation systems across energy storage and power infrastructure portfolio. This role manages large multi-site projects and processes with limited oversight from engineering leadership sets control strategy and software standards for the broader engineering organization and coaches reviews and delegates work to junior and mid-level engineers. The role owns resolution of the most difficult and often complex control integration and field-performance problems and serves as the primary technical authority interfacing with clients vendors and internal stakeholders on high-stakes engagements.

Key Responsibilities

• Serve as subject matter expert (SME) for control software architecture and control strategy across large-scale BESS and power infrastructure projects operating with limited oversight from engineering leadership.
• Lead system architecture discussions; define and own control strategy standards functional specification templates and design frameworks used across the engineering organization.
• Architect develop and maintain PLC HMI and embedded/control software platforms; establish reusable code libraries design patterns and coding standards for the broader team.
• Own configuration integration and lifecycle management of Ignition SCADA systems across the project portfolio including HMI development standards and data architecture.
• Set and enforce software documentation version control and CI/CD practices across the engineering team; drive continuous improvement of automation scripts testing tools and simulation environments.
• Lead cross-functional collaboration with electrical mechanical firmware and field service teams on complex ambiguous integration challenges.
• Lead selection evaluation and qualification of control hardware and vendors (controllers relays meters network devices); own vendor relationships and technical negotiations.
• Plan lead and sign off on Factory Acceptance Tests (FATs) and Site Acceptance Tests (SATs) for large or complex projects; mentor junior engineers in test execution.
• Serve as the escalation point for the most complex control logic real-time execution and PLC/SCADA issues; lead root-cause analysis and resolution for critical field and operational incidents remotely and on-site.
• Own and drive cybersecurity compliance strategy for control systems ensuring adherence to UL IEEE NFPA and other applicable standards across the project portfolio.
• Provide senior technical oversight during installation commissioning and field deployment for major projects.
• Coach review and delegate work to junior and mid-level Software & Controls Engineers; support technical skill development and career growth.
• Act as primary technical point of contact for clients vendors and internal stakeholders on the most complex engagements; lead technical documentation training and knowledge-transfer efforts.
• Manage large projects and processes with limited oversight from management ensuring on-time on-budget delivery of control software deliverables.

Requirements

• Bachelors degree in Electrical Engineering Controls Software Engineering or a related field (Masters degree preferred) or equivalent advanced experience.
• 812 years of progressive experience developing PLC HMI and control software for industrial or energy systems including experience leading complex projects.
• Demonstrated experience coaching mentoring and reviewing the work of junior/mid-level engineers.
• Expert-level object-oriented programming skills (e.g. C C# Python or similar).
• Advanced hands-on expertise with Siemens PLC programming (TIA Portal) across multiple large-scale deployments.
• Deep expertise with Ignition SCADA including advanced HMI development system architecture and integration at scale.
• Strong command of control algorithms real-time systems and industrial automation concepts with the ability to define standards and best practices.
• Expert knowledge of industrial communication protocols (e.g. Modbus OPC UA Profinet) and system integration architecture.
• Proven track record establishing version control CI/CD and structured software development practices across a team.
• Demonstrated ability to independently diagnose and resolve highly complex control system issues both remotely and on-site.
• Experience leading FAT/SAT programs and signing off on acceptance criteria for large or complex projects.
• Strong communication and leadership skills; experience interfacing directly with senior stakeholders and clients.
• Willingness to travel extensively for commissioning field deployments and client engagements including travel to the United States.

For US-based roles - What youll 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 youll 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: 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
• Benefits vary by role and location and are subject to change.

Agency Notice: 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 . No placement fees or compensation will be paid for unsolicited candidate submissions.