Wire Harness Circuitry Design Senior Engineer (SEP4)
Toyota Motor Sales, U.S.A.
Design
Saline, MI, USA
Posted on Oct 20, 2025
Overview
Who we are
Collaborative. Respectful. A place to dream and do. These are just a few words that describe what life is like at Toyota. As one of the world’s most admired brands, Toyota is growing and leading the future of mobility through innovative, high-quality solutions designed to enhance lives and delight those we serve. We’re looking for talented team members who want to Dream. Do. Grow. with us.
To save time applying, Toyota does not offer sponsorship of job applicants for employment-based visas or any other work authorization for this position at this time.
Who We’re Looking For
Toyota’s Systems Engineering and Planning -4 (Wire Harness and Packaging) Department is seeking a highly motivated Senior Engineer. This role is responsible for wire harness circuitry design and development of power distribution systems that support every electrical system in the vehicle.
Reporting to the Senior Engineering Manager, this position will support SEP-4’s mission to enrich customer lives through safe, responsible, and reliable mobility by delivering world-class electrical infrastructure systems.
What You’ll Be Doing
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Create and review circuitry design outputs:
Power Distribution (Fuse and Relay)
Joint and wire-to-wire design
CAN communication and layout
Earthing layout
Wiring diagrams and connector drawings
Wire harness part variations (part dividers)
Build/maintain circuitry development schedules aligned to WH routing and vehicle milestones.
Coordinate wiring specification requests across Z groups and close out with system owners.
Create/maintain production & prototype parts lists; issue ECIs and PPRs as needed.
Manage supplier design requests for parts (power distribution box, fuses, terminals, connectors).
Lead supplier design-in members; allocate tasks, ensure schedules are met, resolve issues, and report to management.
Collaborate with routing/project leaders to address WH-related issues.
Support prototype and mass production trials, troubleshooting WH concerns onsite.
Perform additional duties as assigned.
What You Bring
B.S. in Electrical Engineering or related discipline
Knowledge of parts list/BOM creation
Knowledge of wire harness circuitry design processes
Supplier collaboration experience
Vehicle build trial support experience and troubleshooting skills
Leadership on vehicle projects or company initiatives
Ability to interpret wiring specifications and detect/correct errors
Knowledge of WH manufacturing processes (terminal crimping, splicing, connector selection, etc.)
Proficiency in Microsoft Office
Excellent communication, interpersonal, and negotiation skills
Added Bonus If You Have
CATIA or 3D wire harness modeling experience
CR5000 or Cabling Designer experience
Python programming/coding experience
TBP completion
Proficiency with Toyota systems (New-SMS, G-SMS, Tech Notices)
Japanese language skills
What we’ll bring
During your interview process, our team can fill you in on all the details of our industry-leading benefits and career development opportunities. A few highlights include:
A work environment built on teamwork, flexibility, and respect
Professional growth and development programs to help advance your career, as well as tuition reimbursement
Team Member Vehicle Purchase Discount.
Toyota Team Member Lease Vehicle Program (if applicable).
Comprehensive health care and wellness plans for your entire family
Toyota 401(k) Savings Plan featuring a company match, as well as an annual retirement contribution from Toyota regardless of whether you contribute
Paid holidays and paid time off
Referral services related to prenatal services, adoption, childcare, schools, and more
Tax Advantaged Accounts (Health Savings Account, Health Care FSA, Dependent Care FSA)
Belonging at Toyota
Our success begins and ends with our people. We embrace all perspectives and value unique human experiences. Respect for all is our North Star. Toyota is proud to have 10+ different Business Partnering Groups across 100 different North American chapter locations that support team members’ efforts to dream, do and grow without questioning that they belong.
Applicants for our positions are considered without regard to race, ethnicity, national origin, sex, sexual orientation, gender identity or expression, age, disability, religion, military or veteran status, or any other characteristics protected by law.
Have a question, need assistance with your application or do you require any special accommodations? Please send an email to talent.acquisition@toyota.com.