• Develop electrical designs for medium- and high-voltage substations supporting renewable energy projects. • Prepare one-lines, three-lines, wiring diagrams, grounding plans, protection and control schematics, and equipment layouts. • Design and specify substation equipment including transformers, breakers, relays, switches, and protection systems. • Perform basic power system studies as required (load flow, short circuit, grounding, etc.). • Produce and review design drawings using AutoCAD and/or MicroStation. • Prepare technical specifications, design calculations, and engineering documentation. • Support permitting, utility interconnection, and regulatory submittals. • Coordinate with civil, structural, protection & controls, and solar engineering teams. • Support construction teams by responding to RFIs, reviewing submittals, and resolving field issues. • Ensure designs comply with NEC, NESC, IEEE standards, utility requirements, and project-specific criteria. • Incorporate safety, constructability, and long-term reliability into all designs.

• Review mechanical/HVAC design documents, calculations, and submittals for completeness, constructability, and alignment with Government requirements; provide written comments and recommended resolutions. • Support facility condition assessments by evaluating mechanical systems documentation, identifying deficiencies, and drafting recommended corrective actions. • Perform technical research and analysis related to HVAC performance, ventilation, energy efficiency, and indoor air quality; document findings for Government consideration. • Develop and/or review equipment schedules, sequence of operations narratives, and engineering options analyses to support Government evaluation. • Draft technical inputs for Statements of Work, performance requirements, acceptance criteria, and evaluation factors for Government review and approval. • Coordinate with architectural and other engineering disciplines to identify interfaces (e.g., power, controls, space constraints) and integration issues. • Support commissioning and closeout documentation reviews (as applicable), including verification checklists and deficiency tracking. • Prepare technical briefings, decision-support matrices, and executive summaries for Government stakeholders.

• Lead assigned product design activities from initial requirements and quotation support through documentation, qualification testing, and production readiness. • Create and maintain engineering drawings, product specifications, bills of materials, purchase specifications, and related technical documentation. • Apply knowledge of wire and cable products, connectors, wire sizing, materials, and industry standards to develop practical, manufacturable product designs. • Review customer requirements and provide engineering input related to product construction, materials, compliance, testing, and manufacturability. • Communicate with customers and their engineering, quality, or reliability teams to clarify technical requirements and support design reviews and product approvals. • Maintain accurate product design, testing, qualification, regulatory, supplier, and compliance records.

• Perform mechanical system engineering tasks for the development of Deep Fission’s surface facilities - from conceptual development through licensing, fabrication, construction, startup, and turnover. • Coordinates or prepares diagrams, specifications, procurement documents, and award recommendations. • Ensure effective coordination with the other engineering disciplines to maintain alignment on technical scope. • Advance designs rapidly in a dynamic environment, applying sound engineering judgment and calculated risk management. • Support interface activities between partner organizations and major subcontractors, participating in face-to-face events to create effective work and decision-making environments. • Contribute to general design coordination events such as mechanical system design reviews and in-person design workshops. • Promote a proactive nuclear safety culture across office and field-based activities. • Advocate for the Deep Fission company and its technology. • Participate in project planning (schedule and budgeting) and be prepared to commit to delivery against the project plan. • Provides assistance to project and construction management for mechanical system requirements, identifying issues as they arise during project execution.