About Mainspring

Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more.

The core values that ground our work, guide our decisions, and connect us together:

Pragmatic Optimism
Excellence without Ego
Proactive Collaboration

Job Overview

Mainspring Energy builds linear generators that change how the world gets dependable, clean power. We are scaling up manufacturing in Monterrey, and we're looking for a Senior Industrial Engineer to help design our next production lines.

You will drive key parts of line design: breaking the assembly process into balanced stations, sizing operator count and station quantity, defining the line flow, and checking it through simulation before anything is built on the floor.

The ideal candidate has designed production lines before and is comfortable with virtual manufacturing tools. They should also be able to turn takt time, product routings and capacity targets into a line layout that is efficient, scalable and ready to build.

Your work will help shape how our products get built for years to come and will directly enable Mainspring's aggressive growth targets.

Responsibilities

End-to-end design of assembly and production lines

Break the work down station by station: define work content, sequence, and precedence for each operation

Calculate takt time, cycle times, number of stations, and operator headcount needed to meet volume targets

Perform line balancing to reduce idle time and bottlenecks and to get the most labor and equipment out of the line

Design the line flow and layout, including station placement, buffers, WIP strategy, and operator movement

Build and run discrete-event simulations and virtual manufacturing models to check capacity, find constraints, and compare layout options before investing

Define equipment, tooling, and fixture needs for each station, working with suppliers and internal teams

Build capacity models and scenarios for volume ramps and future product changes

Work with Design Engineering, Quality, Test, and Operations to build DFM/DFA input into the line design

Create standard work, and line design specifications for launch

Support line installation, commissioning, and ramp-up, then improve performance after Launch

Qualifications

Bachelor's or Master's degree in Industrial, Mechanical, or Manufacturing Engineering, or a related field

5–8 years of experience in manufacturing engineering, with direct experience designing production lines

Proven track record of launching assembly lines, including station design, line balancing, and headcount planning

Hands-on experience with simulation and virtual manufacturing tools (e.g., Siemens Plant Simulation, Process Simulate, FlexSim, Arena, Simio, AnyLogic, DELMIA, or similar)

Required Skills & Competencies

Strong command of line balancing, takt time analysis, time studies (MTM/MOST a plus), and capacity planning

Experience designing line flow and factory layouts for assembly operations

Proficiency in CAD (2D/3D) for layout and station design

Solid knowledge of Lean Manufacturing: VSM, Standard Work, flow and pull systems, 5S, Poka-Yoke

Strong analytical, data-driven mindset; comfortable building models in Excel/Python or similar

Excellent communication skills to present line design proposals to cross-functional teams and leadership

Fluent in English and Spanish

Willing and able to travel internationally

Preferred Skills & Competencies

Experience with material flow, such as intralogistics, line-side supermarkets, kanban, kitting, or AGV/AMR systems

Experience with heavy or large-assembly products, or high-mix, low-volume environments

Does your experience not meet all of our posted requirements? Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement. At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don’t meet all posted requirements for a particular role, we’d still love to hear from you. Mainspring can sometimes be flexible enough to shift responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background.

In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.

Mainspring Energy

Senior Industrial Engineer

About the Job

Requirements

Responsibilities

Desired Qualifications

About Mainspring

Job Overview

Responsibilities

Qualifications

Required Skills & Competencies

Preferred Skills & Competencies

About the Company

Mainspring Energy

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