Mainspring Energy

SDET

• Establish Mainspring’s overall test strategy for circuit boards and electrical assemblies
• Develop test requirements and translate them into a variety of testers, from manual screening tests to fully automated testers
• Design and integrate complex hardware test fixtures, including mass interconnect solutions and swappable bed-of-nails systems
• Determine which projects to insource and which to outsource. For outsourced projects, you will manage external partners that are developing and building testers
• Deploy test systems at our manufacturing partners’ facilities to capture quality issues earlier in the build process
• Drive test coverage improvements and manage technical escalations with contract manufacturers (e.g., optimizing Flying Probe, ICT, and AOI test coverage)
• Collaborate with product design engineers to improve their designs for manufacturability (DFM), testability (DFT), and cost reduction
• Validate test systems and production yields using statistical data analysis tools (e.g., GR&R, Cpk, SPC)

Staff Electrical Test Development Engineer – NPI

Engineer

• CAPA Leadership & Escalation Ownership: Serve as the single point of contact for all EE Corrective and Preventive Action (CAPA) issues. Take charge of investigating fleet issues, establishing immediate containment paths, and driving permanent resolutions
• Hands-on Lab Diagnostic Validation: Conduct intensive hands-on electrical lab bench testing to reproduce fleet and manufacturing anomalies. Utilize standard laboratory diagnostic equipment (oscilloscopes, digital multimeters, power supplies, logic analyzers, and electronic loads) to validate containment strategies and prove out root-cause theories
• Root Cause & Failure Analysis: Lead end-to-end problem resolution spanning from initial telemetry data parsing to deep-dive root cause analysis. Partner closely with our internal Failure Analysis (FA) experts to diagnose complex electronics and hardware system failures
• Design Ownership for Reliability: Directly drive the continuous improvement of our deployed hardware ecosystem. You will have the technical authority to own and execute the engineering change lifecycle—from designing and releasing targeted PCBA revisions to identifying, testing, and qualifying strategic off-the-shelf (OTS) components—to permanently eliminate failure modes and improve system performance
• Cross-Functional Tiger Team Representative: Act as the authoritative EE voice on the cross-functional CAPA Tiger Team. Interface daily with Core Reliability, Mechanical, Software, and Manufacturing teams to ensure a unified approach to system-level reliability
• Technical Triage & Strategy: Function as the primary gatekeeper for incoming electrical engineering challenges. For specialized issues, triage, prioritize, and collaboratively map out resolution strategies with design specialists across the EE department
• Metrics & Infrastructure Management: Own and optimize the EE Atlassian/Jira Problem dashboard. Systematically track, analyze, and report on key performance indicators (e.g., Mean-Time-Between-Swaps/MTBSwap) to demonstrably reduce field failure rates and eBox replacements
• Technical Knowledge Capture & Standards: Author comprehensive failure analysis reports, root-cause whitepapers, and standardized electrical triage workflows. You will turn deep-dive technical findings into institutional knowledge, creating the foundational documentation required to scale this sub-team and uplevel the broader engineering organization

Staff Electrical Systems – Sustaining Engineer

• Serve as the single point of contact for all EE Corrective and Preventive Action (CAPA) issues. Take charge of investigating fleet issues, establishing immediate containment paths, and driving permanent resolutions
• Conduct intensive hands-on electrical lab bench testing to reproduce fleet and manufacturing anomalies. Utilize standard laboratory diagnostic equipment (oscilloscopes, digital multimeters, power supplies, logic analyzers, and electronic loads) to validate containment strategies and prove out root-cause theories
• Lead end-to-end problem resolution spanning from initial telemetry data parsing to deep-dive root cause analysis. Partner closely with our internal Failure Analysis (FA) experts to diagnose complex electronics and hardware system failures
• Directly drive the continuous improvement of our deployed hardware ecosystem. You will have the technical authority to own and execute the engineering change lifecycle—from designing and releasing targeted PCBA revisions to identifying, testing, and qualifying strategic off-the-shelf (OTS) components—to permanently eliminate failure modes and improve system performance
• Act as the authoritative EE voice on the cross-functional CAPA Tiger Team. Interface daily with Core Reliability, Mechanical, Software, and Manufacturing teams to ensure a unified approach to system-level reliability
• Function as the primary gatekeeper for incoming electrical engineering challenges. For specialized issues, triage, prioritize, and collaboratively map out resolution strategies with design specialists across the EE department
• Own and optimize the EE Atlassian/Jira Problem dashboard. Systematically track, analyze, and report on key performance indicators (e.g., Mean-Time-Between-Swaps/MTBSwap) to demonstrably reduce field failure rates and eBox replacements
• Author comprehensive failure analysis reports, root-cause whitepapers, and standardized electrical triage workflows. You will turn deep-dive technical findings into institutional knowledge, creating the foundational documentation required to scale this sub-team and uplevel the broader engineering organization

Senior Electrical Systems – Sustaining Engineer

Recruitment

• Drive outbound sourcing campaigns for high-priority engineering roles
• Build targeted pipelines across hardware, mechanical, electrical, firmware, controls, manufacturing, and software engineering disciplines
• Conduct detailed talent mapping and market research for niche or hard-to-fill skill sets
• Partner closely with recruiters and hiring managers to align on candidate profiles and outreach strategies
• Develop personalized, high-conversion outreach that clearly communicates Mainspring’s mission, culture, technology, and growth trajectory
• Leverage sourcing platforms and alternative channels to identify high-signal candidates
• Utilize AI-enabled sourcing tools and automation thoughtfully to improve search precision, messaging personalization, workflow efficiency, and candidate engagement
• Qualify and conduct initial outreach conversations as needed
• Track sourcing metrics (response rates, conversion rates, from posting to interviews) and continuously optimize strategy
• Maintain clean, accurate data within the ATS

Technical Talent Sourcer – 6-Month Contract

Procurement

• Build, manage, and develop a team of commodity managers and sourcing program managers; establish a management layer as the function scales. Own the departmental budget, headcount plan, and organizational sourcing policies and process standards
• Serve as the supply chain escalation point to executive leadership; reconcile competing priorities across Engineering, Finance, Legal, and Operations to drive business results
• Partner with Engineering and Product Management as a core member of the product roadmap process, contributing supply chain input to feature definition across deployment environments; own DFM and DFX to ensure manufacturability, sourcing optionality, and cost competitiveness are built into designs from the earliest stages of NPI
• Set and execute commodity strategy - make/buy frameworks, preferred supplier lists, risk tiering - targeting best total cost across price, lead time, quality, and working capital
• Develop and implement the inbound logistics and procurement strategy for the electrical commodity portfolio; support MRP/ERP system development and ensure procurement parameters reflect supply chain strategy
• Own the sourcing strategy for Mainspring’s AC-to-DC product transition, including BOM-level lead time analysis, risk buy decisions, and production readiness
• Source and qualify power conversion equipment (inverters, transformers, skidded systems) across multiple suppliers to eliminate single-source dependencies; ensure business continuity and benchmark against the competitive supply landscape
• Own and execute a multi-path battery and BMS sourcing strategy compliant with FEOC and IRA requirements across non-restricted geographies; monitor FEOC, IRA/ITC, USMCA, and tariff developments to adjust strategies proactively; brief executive leadership on investor-facing compliance and cost readiness
• Identify, evaluate, and onboard contract manufacturers for electrical assemblies (US/Mexico, USMCA-compliant); lead rapid-turnaround sourcing for R&D electrical builds including PCBAs, connectors, cables, sensors, and electromechanical assemblies
• Own should-cost modeling across the electrical commodity portfolio; lead cost-down initiatives with annual savings targets tied to product cost roadmap milestones and working capital improvement goals
• Negotiate contracts from R&D quick-turn through long-term volume agreements; own supplier risk assessments, SPOF mitigation planning, and business continuity for critical commodities

Director, Electrical Strategic Sourcing

Sales

• Partner with Sales teams to support customer contracting from pre-deal structuring through execution
• Act as the primary cross-functional coordinator between Sales and internal stakeholders during commercial negotiations
• Drive alignment among Legal, Finance, Project Delivery, Product, and Executive teams on deal terms
• Translate commercial objectives into actionable internal requirements and approvals
• Facilitate internal review and approval workflows for customer agreements
• Maintain visibility into active deal pipelines and proactively remove blockers to contract execution
• Track contract status, approvals, open issues, and execution timelines across multiple concurrent deals
• Partner with Legal to standardize templates, fallback positions, and negotiation guidance

Senior Sales Contracting Manager

Customer Support

• Monitor system alerts and notifications during assigned overnight shifts
• Follow established troubleshooting protocols to address issues
• Execute problem-solving actions based on provided flowcharts
• Restart hardware systems or escalate issues to senior engineering staff as needed
• Maintain detailed logs of alerts and actions taken
• Ensure all issues are resolved within the allotted time or escalated appropriately
• Provide weekend and flexible shift coverage, including filling in for team absences or vacations as needed

Associate Operations Support Specialist II

QA Engineer

• Build and maintain trust-based relationships with assigned suppliers, serving as the primary quality point of contact
• Own the supplier quality gate from New Product Introduction (NPI) through steady-state production
• Issue and drive closure of Supplier Corrective Action Requests (SCARs) using structured root cause analysis methodology (8D)
• Review and approve material and process deviation requests from suppliers
• Conduct supplier process audits and site visits to assess compliance to control plans, quality system requirements, and Mainspring standards
• Own incoming inspection disposition and NCR management for assigned suppliers
• Maintain SPC monitoring and control plan updates in steady-state production
• Act as subject matter expert and internal resource for the SQE team on special processes

Staff Supplier Quality Engineer – Special Processes

General Counsel

• Provide thoughtful, risk-balanced, and business-minded advice to internal stakeholders on a wide range of complex contracts, such as equipment and project sale agreements, operation and maintenance contracts, development services agreements, EPC Agreements, financed offerings, and various supporting agreements
• Work closely with stakeholders across the company to architect and refine contract forms, templates, and playbooks, as well as scalable processes to support these tools
• Partner deeply with Sales, Finance, Project Delivery, Operations and other teams to drive execution of high-stakes commercial agreements
• Lead end-to-end contract negotiations for various commercial agreements with customers in the commercial and industrial, data center, governmental, and utility sectors, balancing legal protection with business velocity
• Develop and deliver training and other materials to elevate the legal IQ of the organization on contract terms and other legal issues

Senior Counsel

Software Engineer

• Own PLM as a cross-functional business program, ensuring it supports company priorities across Engineering, Manufacturing, Supply Chain, Quality, and Field Service.
• Define and maintain the PLM roadmap, aligning system capabilities and process improvements to business needs, scale requirements, and product lifecycle priorities.
• Drive alignment across functional leaders on priorities, decisions, process standards, and investment needs related to PLM and connected engineering systems ( Colab, SolidWorks, Altium 365 ).
• Establish decision-making forums, ownership models, and governance processes for PLM enhancements, master data standards, change workflows, and business process adoption.
• Partner with stakeholders to design and improve end-to-end lifecycle processes spanning eBOM, mBOM, Service BOM, engineering change management, configuration management, and traceability.
• Translate business needs into sequenced workstreams, balancing short-term operational issues with longer-term platform and process maturity goals.
• Lead organizational adoption of new PLM workflows, standards, and ways of working; ensure the right teams are engaged early and that changes are durable.
• Assess process, system, and resource gaps that limit PLM effectiveness, and recommend staffing, workflow, or tooling changes needed to close them.
• Define success metrics and ensure PLM investments are improving data quality, process efficiency, traceability, change execution, and cross-functional visibility.
• Work closely with the PLM technical lead to translate business priorities into system requirements, feature releases, enhancements, and integration needs.
• Help drive alignment across PLM, ERP, WMS, MES, and Salesforce FSM or other downstream systems that depend on accurate product and configuration data.
• Write clear business requirements, user stories, and operating needs for developers, administrators, and implementation partners.
• Support stakeholder readiness, communication, and training for PLM process updates, new capabilities, and role expectations.
• Surface and resolve cross-functional blockers that impact data quality, execution speed, system usage, or business outcomes.
• Run a clear operating rhythm for roadmap reviews, prioritization, business requirement intake, release readiness, and post-launch adoption follow-through.

Senior Manager, PLM Engineering Tools – Systems

Compliance

• Provide thoughtful and operationally practical support to internal stakeholders on environmental compliance and permitting requirements, with a focus on air quality regulations and reporting obligations
• Partner with Operations and O&M teams to ensure environmental compliance is embedded into day-to-day execution and long-term planning
• Identify emerging regulatory risks and translate requirements into clear internal actions, documentation, and timelines
• Architect and refine scalable compliance processes, including permit tracking, reporting workflows, and documentation standards that integrate with Mainspring’s Environmental Management System (EMS)
• Drive continuous improvement by identifying opportunities for automation, system enhancements, and tool development (e.g., scripts, dashboards, database improvements) to improve accuracy, speed, and audit readiness
• Develop and maintain Permit Action Plans for operational activities, ensuring timely permit acquisition, renewals, and ongoing compliance
• Own and maintain the air emissions tracking dashboard, ensuring data integrity, accuracy, and real-time visibility for internal stakeholders
• Maintain cross-platform compliance documentation and data integrity across key enterprise systems, ensuring compliance activities, timelines, and records remain complete and audit-ready
• Maintain records of environmental monitoring data, compliance documentation, and reporting outputs, ensuring timely and accurate EMS inputs
• Support the coordination and execution of Source Testing activities, including scheduling, contractor management, protocol review support, and site logistics
• Track and analyze source testing results, flagging potential compliance risks and ensuring accurate internal and external reporting
• Coordinate Portable Analyzer Checks and support the development of digital tools to simplify and standardize field documentation
• Coordinate and track maintenance and part replacement schedules for environmental control equipment and monitoring instruments
• Help elevate environmental compliance capability across the organization by developing clear guidance, documentation, and training materials for operational teams
• Contribute to the development of internal playbooks and best practices to support compliance execution at scale