Field Applications Engineer

EnerSys; California (MO); On-site; USD 76,000 - 95,000; Full time

Benefits offered by this job

Paid Holidays

Medical, vision and dental

Life Insurance

Tuition reimbursement plan

Defined Pension Plan

Job summary

EnerSys seeks a Field Applications Engineer to support the reliability and performance of battery-buffered DC fast charging and energy storage systems deployed in the field.

You will troubleshoot complex hardware, software, firmware, and networking issues, analyze logs and fleet data, reproduce field failures, and validate corrective actions before deployment. This is a hands-on, cross-functional role with ~30% travel, including international.

Qualifications

• Bachelor’s degree in a related engineering discipline.
• Familiarity with Linux/Unix environments and programming languages such as C and C++.
• Electrical troubleshooting fundamentals, including reading wiring diagrams and schematics.
• Ability to collect and analyze system logs, telemetry, and fault data to support troubleshooting.

Responsibilities

• Maintain and improve reliability and performance of battery-buffered DC fast charging stations.
• Troubleshoot hardware, software, firmware, communications, networking, and system-level issues.
• Lead or support root-cause investigations into downtime, reboots, charging faults, and degraded performance.
• Collaborate with Site Reliability Engineering to analyze large datasets and identify reliability trends.
• Translate field data into actionable engineering recommendations for hardware and software teams.
• Document investigations, actions, test results, and lessons learned to improve the charging platform.

Skills

Linux/Unix

C/C++

Troubleshooting

Networking (TCP/IP)

Modbus/MQTT

CAN/I2C/SPI

Technical communication

Learning new technologies

Travel willingness

Education

Bachelor’s degree in Mechatronics Engineering

Bachelor’s degree in Electrical Engineering

Bachelor’s degree in Computer Engineering

Job description

EnerSys is a global leader in stored energy solutions for industrial applications. We have over thirty manufacturing and assembly plants worldwide servicing over 10,000 customers in more than 100 countries. Worldwide headquarters are located in Reading, PA, USA with regional headquarters in Europe and Asia. We complement our extensive line of Motive Power and Energy Systems with a full range of integrated services and systems. With sales and service locations throughout the world, and over 100 years of battery experience, EnerSys is the power/full solution for stored DC power products.

What We’re Offering

• Paid Holidays
• Medical, vision and dental
• Life Insurance, long term disability
• Tuitionreimbursement plan
• Defined Pension Plan

Compensation Range:$75,900.00 - $94,800.00

Compensation may vary based on applicant's work experience, education level, skill set, and/or location.

This is a current vacant position.

Job Purpose

The Field Applications Engineer supports the reliability, availability, and performance of battery-buffered DC fast charging and energy storage systems deployed in the field. Working closely with Field Service, Engineering, Operations, and Site Reliability Engineering, this position troubleshoots complex hardware, software, firmware, communication, networking, and vehicle-interoperability issues; analyzes system logs and fleet data; reproduces field failures; and validates corrective actions before and after deployment. This is a hands-on, cross-functional engineering role for someone interested in developing expertise across EV charging, battery energy storage, embedded systems, power electronics, networking, software, and data analytics. Approximately 30% travel is required, including international travel.

Essential Duties and Responsibilities

• Maintain and improve the reliability, availability, and performance of deployed battery-buffered DC fast charging stations.
• Work closely with Enersys Service team to resolve issues
• Troubleshoot complex hardware, software, firmware, communications, networking, and system-level issues affecting charger operation.
• Lead or support root-cause investigations into charger downtime, unexpected reboots, failed charging sessions, recurring faults, and degraded performance.\
• Perform EV interoperability and compatibility testing across different vehicle manufacturers, models, and charging implementations.
• Analyze charging protocols, system logs, telemetry, fault data, and charging-session behavior to diagnose vehicle-to-charger compatibility issues.
• QA/testing in Embedded or IoT systems - Develop software, scripts, diagnostic utilities, automated tests, and data-analysis tools that improve troubleshooting and system validation.
• Reproduce field failures in test environments and validate engineering fixes before deployment.
• Partner closely with Site Reliability Engineering to analyze large operational datasets and identify systemic reliability trends across the charging fleet.
• Develop metrics, dashboards, and analytical methods for understanding charger uptime, downtime, reboot frequency, fault recurrence, charging success rates, and recovery performance.
• Correlate software releases, hardware configurations, vehicle types, environmental conditions, and operational events with reliability outcomes.
• Translate field and fleet data into actionable engineering recommendations and clearly defined problem statements for hardware and software development teams.
• Support deployment and validation of corrective actions and measure their effectiveness after release.
• Collaborate across electrical, mechanical, firmware, software, systems, test, operations, field service, and SRE teams to drive issues through root cause and permanent resolution.
• Document technical investigations, root causes, corrective actions, test results, and lessons learned to continuously improve the charging platform.

Qualifications

• Bachelor’s degree in Mechatronics Engineering, Electrical Engineering, Computer Engineering, or a related engineering discipline.
• Familiarity with Linux/Unix environments and programming languages such as C and C++.
• Electrical troubleshooting fundamentals, including the ability to read and interpret wiring diagrams, schematics, and circuit diagrams.
• Ability to collect, interpret, and analyze system logs, communication traces, diagnostic data, telemetry, and error codes to support troubleshooting and fault investigation.
• Strong problem-solving and analytical skills, with the ability to perform structured troubleshooting and root cause analysis.
• Basic familiarity with high-voltage electrical systems and electrical safety principles.
• Basic understanding of computer networking, including TCP/IP and IP-based communications.
• Familiarity with industrial and IoT communication protocols such as Modbus and MQTT.
• Understanding of common embedded communication buses and protocols, including CAN, I²C, and SPI.
• Strong technical communication and report-writing skills, with the ability to clearly document problems, investigations, findings, and recommended corrective actions.
• Ability and willingness to learn new technologies spanning EV charging, battery energy storage, power electronics, embedded systems, software, networking, and data analytics.
• Valid driver’s license.
• Ability and willingness to travel approximately 30%, including international travel to locations such as France, Italy, and the United States.

EnerSys is committed to employment equity and fostering a workplace that respects and values diversity, inclusion, and dignity for all.
We provide equal employment opportunities to all employees and applicants, and strictly prohibit discrimination or harassment of any kind based on race, colour, religion, age, sex, national or ethnic origin, citizenship, disability, sexual orientation, gender identity or expression, marital or family status, or any other characteristic protected by applicableCanadian and provinciallaws".

We encourage applications from members of equity-deserving groups, including women, Indigenous Peoples, racialized persons, persons with disabilities, and members of the 2SLGBTQIA+ community.