Sr. Reliability Engineer

About Range Energy Range Energy builds powered trailers that help electrify heavy-duty trucking without requiring fleets to replace their tractors. We solve real-world problems with real hardware.   We move fast, take ownership, and hold a high bar for execution. We value people who are low ego and team-first, calm under pressure, direct and respectful communicators, willing to roll up their sleeves, and focused on solutions, not drama.   We operate with high integrity. We do what we say we’ll do, we’re transparent about risks and tradeoffs, and we build trust through consistent follow-through.   The work is hands-on. Sometimes messy. Often fast. Always meaningful.   Founded in 2021, Range is led by experienced EV operators from Tesla, Zoox, Honda, and other leading OEMs. We are backed by strong investors and focused on building hardware that fleets will actually use.   If you like building real things, solving hard problems, and working with low drama, high output teammates, you will fit here.   Role Summary As the Sr. Reliability Engineer, you will be pivotal in ensuring the dependability and performance of our products throughout their lifecycle. Collaborating closely with cross-functional teams, you will design and implement testing protocols, analyze data, and drive improvements to enhance product reliability. This position offers a unique opportunity to contribute to the advancement of cutting-edge electric vehicle technology.

Key Responsibilities

• Define, own, and continuously mature Range's end-to-end reliability program, establishing standards, processes, and culture across engineering, manufacturing, and operations
• Build and maintain a reliability roadmap aligned with product development milestones and fleet growth targets
• Develop and deploy predictive reliability models leveraging field telemetry, sensor data, and historical failure data to anticipate failures before they occur
• Build reliability growth models (Duane, AMSAA/Crow) to track and project reliability improvement over the product lifecycle
• Apply statistical methods Weibull analysis, Monte Carlo simulation, regression modeling to quantify failure risk and remaining useful life (RUL) of critical components
• Establish and monitor fleet-level KPIs including MTBF, MTTR, availability, failure rate, and warranty cost trends
• Define and leadDFMEAs to proactively identify and mitigate failure modes across systems to minimize costs and enhance customer satisfaction
• Define and enforce reliability requirements at the system, subsystem, and component level for Class 8 powertrain, chassis, and vehicle integration applications
• Conduct reliability allocation and reliability block diagram (RBD) modeling to ensure top-level uptime targets are achievable by design
• Champion reliability-centered design decisions including redundancy strategies, derating, and materials selection appropriate for heavy-duty trucking environments
• Author and maintain master Test Plans covering scope, objectives, resources, schedules, entry/exit criteria, and risk, ensuring alignment across engineering, program management, and leadership stakeholders
• Develop and execute comprehensive testing protocols including environmental (temperature, humidity, thermal shock, vibration, dust/water ingress), durability, fatigue, load, and accelerated life testing (ALT) tailored to Class 8 operating conditions
• Build Usage Profiles and Mission Profiles that accurately represent real-world Class 8 duty cycles long-haul, regional, and vocational and translate them into lab-equivalent test specifications
• Define and manage the Design Verification Plan and Report (DVP&R) for all major systems and subsystems, ensuring full traceability from requirements through test evidence
• Develop Production Validation Testing (PVT) plans to confirm that manufacturing processes do not degrade reliability relative to design intent
• Lead investigations into product failures, perform root cause analyses using 8D, Fishbone, 5-Why, and FTA methodologies, and implement corrective actions to prevent recurrence
• Maintain a living failure database and lessons-learned repository to capture institutional knowledge and inform future designs
• Create detailed reports, including DVP&Rs, test reports, failure analysis summaries, and reliability scorecards, to document testing procedures, results, and corrective actions
• Participate in design reviews and contribute to the development of supplemental design documentation such as assembly instructions, test repor