Sr. Mechanical Engineer - Engine Systems Mobility Customer Services

Siemens Mobility; Sacramento (CA); Hybrid; USD 112,000 - 152,000; Full time

Job summary

Siemens Mobility is seeking a Sr. Mechanical Engineer – Engine Systems Mobility Customer Services to support diesel engine system aftermarket activities.

Based in Sacramento, CA or other listed locations, this role focuses on improving durability, reliability, and cost effectiveness through hands-on analysis and cross-functional collaboration. You will work with quality, manufacturing, supply chain, field service, and suppliers to evaluate hardware, perform teardown analyses, and drive solutions

Qualifications

• Bachelor’s Mechanical Engineering or related field required.
• 5+ years experience with diesel engine systems.
• Hands-on teardown, rebuild, component evaluation.
• Proficiency with 3D CAD and engineering design tools.
• Knowledge of GD&T, tolerancing, thermal expansion, fatigue, and mechanical design.
• Experience supporting supplier qualification and second sourcing.
• Strong technical writing and ability to communicate complex concepts.
• Willingness to travel up to 25% domestically and internationally.

Responsibilities

• Develop engineering requirements, specs, validation plans, and BOMs to meet performance and service targets.
• Perform root cause analysis and translate findings into corrective actions.
• Conduct hands-on hardware evaluations, teardown, measurement, analysis, redesign, and validation.
• Identify and qualify alternative suppliers through technical reviews and capability assessments.
• Define reuse criteria, wear limits, inspection methods, and acceptance standards for overhaul and remanufacturing.
• Recommend design and process improvements to extend component life and reduce lifecycle cost.
• Collaborate with cross-functional teams to move solutions from analysis to implementation.
• Support customer-facing discussions with clear technical explanations and recommendations.
• Create technical documentation, test reports, validation records, CAD models, drawings, and write-ups for traceability.
• Maintain engineering data and BOM information in SAP or equivalent systems.

Skills

Diesel engines

CAD modeling

Root cause analysis

Technical writing

Education

Bachelor's in Mechanical Engineering

Tools

SAP

Job description

Sr. Mechanical Engineer - Engine Systems Mobility Customer Services

Job ID

517230

Posted since

19-Aug-2026

Organization

Mobility

Field of work

Research & Development

Company

Mid-level Professional

Job type

Full-time

Hybrid (Remote/Office)

Employment type

Permanent

Location(s)

• Chicago - Illinois - United States of America
• Philadelphia - Pennsylvania - United States of America
• Sacramento - California - United States of America

Pioneering in America, from the first mile to the last. This is what drives us.

Are you a hands-on mechanical engineer who enjoys solving complex engine challenges and turning technical analysis into practical, field-ready solutions? We are looking for a Senior Mechanical Engineer – Diesel Engine Systems to support critical aftermarket and customer service engineering activities for diesel engine systems, with a focus on improving component performance, reliability, durability, and cost effectiveness.

In this role, you will work closely with quality, manufacturing, supply chain, field service, and supplier partners to evaluate engine hardware, analyze failed components, support second sourcing initiatives, and develop engineering solutions that directly support overhaul and remanufacturing programs. This is an opportunity to combine deep technical expertise with hands-on problem solving in a customer-focused environment where your work helps keep essential rail systems operating safely and reliably.

This position will report to the Service Engineering Manager within the Customer Services engineering group and can be based in Sacramento, CA; Chicago, IL; or Philadelphia, PA, working in a hybrid fashion. This role offers the opportunity to influence technical decisions, collaborate across functions, and help drive continuous improvement across diesel engine platforms.

What your day-to-day will look like:

• Develop engineering requirements, specifications, validation plans, and bills of materials to ensure diesel engine components meet performance, reliability, and serviceability targets.
• Perform root cause analysis on engine systems and components, translating findings into corrective actions that improve durability, reduce repeat failures, and support fleet reliability.
• Conduct hands-on hardware evaluations, including teardown, measurement, analysis, redesign, and validation, to drive practical engineering solutions for overhaul and aftermarket programs.
• Identify, evaluate, and qualify alternative suppliers through technical reviews and capability assessments to strengthen sourcing options while maintaining quality, cost, and schedule objectives.
• Define reuse criteria, wear limits, inspection methods, and acceptance/rejection standards to support consistent, data-driven decisions in engine overhaul and remanufacturing operations.
• Recommend design and process improvements that extend component service life, enhance performance, and reduce lifecycle cost for diesel engine platforms.
• Collaborate with quality, manufacturing, supply chain, test engineering, field service, and supplier teams to move engineering solutions from analysis through implementation.
• Support customer-facing discussions by providing clear technical explanations, recommendations, and documentation that build confidence in engineering decisions.
• Create technical documentation, test reports, validation records, CAD models, drawings, and engineering write-ups to ensure solutions are traceable, repeatable, and ready for production or field use.
• Maintain engineering data and BOM information in SAP or equivalent systems to support accurate configuration management and multi-functional execution.

This posting outlines the primary responsibilities of the role, but is not all-inclusive; additional duties may be assigned in alignment with business needs.

To thrive in this role, you have:

• Bachelor’s Mechanical Engineering or a related subject area.
• 5+ years of experience working with diesel engine systems and components.
• Hands-on experience with engine teardown, rebuild, component evaluation.
• Proficiency with 3D CAD modeling and engineering design tools to support component design, analysis, and documentation.
• Working knowledge of GD&T, tolerancing, thermal expansion, fatigue behavior, and mechanical design principles.
• Experience supporting supplier qualification, and second sourcing initiatives.
• Strong technical writing skills with the ability to create clear engineering documentation, reports, specifications, and recommendations.
• Strong analytical and problem-solving skills, with the ability to manage technical work independently and drive projects to completion.
• Familiarity with SAP or similar ERP systems.
• Ability to travel 25% travel (domestic and occasional international) to support supplier visits, site evaluations, and customer engagement.

Candidates should be willing to work in non-climate-controlled environments and inclement weather if required or if applicable.

Applicants must be legally authorized for employment in the United States without needing current or future employer-sponsored work authorization.

Purpose is the reason a company exists. It's not about making money or selling products - it's the deeper "why" behind everything we do. It answers the question: What problem are we solving? What positive change are we creating?

For Siemens, our purpose has been clear for over 175 years: We create technology to transform the everyday, for everyone.

The world needs technologies that work. Technologies that matter. Technologies that solve today's challenges and help shape a better tomorrow. And that's exactly what we build. By bringing together the real world (factories, buildings, power grids, trains) with the digital world (software, data, AI, digital twins), we help our customers become more competitive, resilient, and sustainable.

Our technology is everywhere - in trains and transportation, we help move people faster, safer, and more sustainably.

You’ll Benefit From
Siemens offers a variety of health and wellness benefits to our employees. Details regarding our benefits can be found here: https://www.benefitsquickstart.com/siemens/index.html
The pay range for this position is $112,200.00 - $151,776.00 annually. The actual wage offered may be lower or higher depending on budget and candidate experience, knowledge, skills, qualifications, and premium geographic location.

Equal Employment Opportunity Statement
Siemens is an Equal Opportunity Employer encouraging inclusion in the workplace. All qualified applicants will receive consideration for employment without regard to their race, color, creed, religion, national origin, citizenship status, ancestry, sex, age, physical or mental disability unrelated to ability, marital status, family responsibilities, pregnancy, genetic information, sexual orientation, gender expression, gender identity, transgender, sex stereotyping, order of protection status, protected veteran or military status, or an unfavorable discharge from military service, and other categories protected by federal, state or local law.

EEO is the Law
Applicants and employees are protected from discrimination on the basis of race, color, religion, sex, national origin, or any characteristic protected by Federal or other applicable law.

Reasonable Accommodations
If you require a reasonable accommodation in completing a job application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please fill out the accommodations form by clicking on this linkAccommodationfor disability form . If you’re unable to complete the form, you can reach out to our AskHR team for support at 1-866-743-6367. Please note our AskHR representatives do not have visibility of application or interview status.

Application Deadline
This role will be posted for a minimum of five (5) days from the original posting date. The posting timeline may change based on applicant volume to ensure we attract and consider a strong and representative candidate pool.

California Privacy Notice
California residents have the right to receive additional notices about theirpersonal information. To learn more, clickhere .

Equal Employment Opportunity Statement
Siemens is an Equal Opportunity Employer encouraging inclusion in the workplace. All qualified applicants will receive consideration for employment without regard to their race, color, creed, religion, national origin, citizenship status, ancestry, sex, age, physical or mental disability unrelated to ability, marital status, family responsibilities, pregnancy, genetic information, sexual orientation, gender expression, gender identity, transgender, sex stereotyping, order of protection status, protected veteran or military status, or an unfavorable discharge from military service, and other categories protected by federal, state or local law.

EEO is the Law
Applicants and employees are protected from discrimination on the basis of race, color, religion, sex, national origin, or any characteristic protected by Federal or other applicable law.

Reasonable Accommodations
If you require a reasonable accommodation in completing a job application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please fill out the accommodations form by clicking on this linkAccommodationfor disability form . If you’re unable to complete the form, you can reach out to our AskHR team for support at 1-866-743-6367. Please note our AskHR representatives do not have visibility of application or interview status.

Pay Transparency
Siemens follows Pay Transparency laws.

Application Deadline
This role will be posted for a minimum of five (5) days from the original posting date. The posting timeline may change based on applicant volume to ensure we attract and consider a strong and representative candidate pool.

California Privacy Notice
California residents have the right to receive additional notices about theirpersonal information. To learn more, clickhere .

Criminal History
Qualified applications with arrest or conviction records will be considered foremployment in accordance with applicable local and state laws.