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Senior Mechanical Engineering Jobs in Riverside, CA

Senior Mechanical Engineer

Lake Forest, CA ยท On-site

$110K - $145K/yr

Sr. Mechanical Engineer Advantest Test Solutions, Inc. (ATS) is looking for a senior level ... This individual will perform a broad range of mechanical engineering functions related to the ...

Senior Mechanical Engineer

Lake Forest, CA ยท On-site

$110K - $145K/yr

Sr. Mechanical Engineer Advantest Test Solutions, Inc. (ATS) is looking for a senior level ... This individual will perform a broad range of mechanical engineering functions related to the ...

Senior Mechanical Engineer

Tustin, CA ยท On-site

$115K - $152K/yr

Senior Mechanical Engineer At Salas O'Brien we tell our clients that we're engineered for impact ... Founded in 1975, Salas O'Brien is an employee-owned engineering and professional services firm ...

Senior Mechanical Engineer

Tustin, CA ยท On-site

$115K - $152K/yr

Senior Mechanical Engineer At Salas O'Brien we tell our clients that we're engineered for impact ... Founded in 1975, Salas O'Brien is an employee-owned engineering and professional services firm ...

Perform mechanical engineering design and technical delivery across a diverse portfolio including healthcare, commercial, higher education, and civic projects * Support design of HVAC, air ...

Senior Mechanical Engineer - Buildings

Irvine, CA ยท On-site

$107.50 - $156.60/hr

Perform mechanical engineering design and technical delivery across a diverse portfolio including commercial, higher education, multi-family residential, and civic projects * Support design of HVAC, ...

Senior Mechanical Engineer

Irvine, CA ยท On-site

$135 - $150/hr

About the Role As a Senior Mechanical Engineer, you will help develop and commercialize next ... Perform engineering analyses, including FEA, tolerance stack-ups, and reliability assessments, to ...

Sr. Mechanical Engineer

Irvine, CA ยท On-site

$112K - $148K/yr

Neon Aero is looking for a Senior Mechanical Engineer to lead the design and integration of complex ... Bachelor's or Master's in Mechanical Engineering or related degree is preferred; relevant ...

Sr. Mechanical Engineer

Pomona, CA ยท On-site

$121K - $148K/yr

The Sr. Mechanical Engineer will lead product sustainment efforts by implementing design ... Bachelor's degree in mechanical engineering or equivalent and 4+ years of Mechanical Engineering ...

Senior Mechanical Engineer

Irvine, CA ยท On-site

$112K - $148K/yr

At the core of our company's identity is a strong foundation in engineering. We take great pride in ... Our product: About the Role As a Senior Mechanical Engineer, you will help develop and ...

Senior Mechanical Engineer

Irvine, CA

$112K - $148K/yr

At the core of our company's identity is a strong foundation in engineering. We take great pride in ... Our product: About the Role As a Senior Mechanical Engineer, you will help develop and ...

Showing results 21-40

Senior Mechanical Engineering information

See Riverside, CA salary details

$77.7K

$127.9K

$178.4K

How much do senior mechanical engineering jobs pay per year?

As of Sep 4, 2026, the average yearly pay for senior mechanical engineering in Riverside, CA is $127,867.00, according to ZipRecruiter salary data. Most workers in this role earn between $109,000.00 and $144,000.00 per year, depending on experience, location, and employer.

What does a senior mechanical engineer do?

A Senior Mechanical Engineer is responsible for designing, developing, and overseeing the production of mechanical systems and components. They lead engineering projects, provide technical guidance to junior engineers, and ensure that designs meet safety, efficiency, and quality standards. These professionals often collaborate with other engineering disciplines, manage project timelines, and troubleshoot complex technical issues. Their work may span industries such as automotive, aerospace, manufacturing, or energy, depending on the employer.

How does a senior mechanical engineer typically collaborate with cross-functional teams during a project?

As a Senior Mechanical Engineer, you will regularly work alongside teams from electrical engineering, manufacturing, quality assurance, and project management. This collaboration often involves participating in design reviews, coordinating timelines, and resolving integration challenges to ensure all components fit and function together seamlessly. Effective communication and teamwork are essential, as you'll be expected to provide technical guidance and ensure that design decisions align with broader project goals. This cross-functional interaction not only ensures the success of the project but also provides opportunities to broaden your expertise and leadership skills.

What are the key skills and qualifications needed to thrive as a senior mechanical engineer, and why are they important?

To thrive as a Senior Mechanical Engineer, you need advanced knowledge of mechanical design, engineering principles, and problem-solving, typically backed by a bachelor's or master's degree in mechanical engineering and professional licensure (PE). Expertise in CAD software, FEA tools, and industry-standard project management systems is essential. Strong leadership, effective communication, and project management skills help you guide teams and collaborate across disciplines. These skills ensure innovative, efficient, and reliable engineering solutions while driving project success and team performance.

What is the difference between Senior Mechanical Engineering vs Mechanical Engineering?

AspectSenior Mechanical EngineeringMechanical Engineering
Required CredentialsBachelor's degree, 5+ years experience, professional engineering license often preferredBachelor's degree in mechanical engineering, entry-level to mid-level experience
Work EnvironmentDesign, development, project management, leadership roles in manufacturing, automotive, aerospaceDesign, analysis, testing, manufacturing in various industries
Employer & Industry UsageEngineering firms, manufacturing companies, R&D departmentsWide range of industries including automotive, aerospace, energy, consumer products

Senior Mechanical Engineers typically have more experience, leadership responsibilities, and advanced certifications compared to Mechanical Engineers. They focus on project oversight, complex design, and mentoring junior staff, whereas Mechanical Engineers often handle core design and analysis tasks. Both roles are essential in engineering teams, but senior roles require more expertise and industry experience.

What are the most commonly searched types of Mechanical Engineering jobs in Riverside, CA?

The most popular types of Mechanical Engineering jobs in Riverside, CA are:

What cities near Riverside, CA are hiring for Senior Mechanical Engineering jobs?

Cities near Riverside, CA with the most Senior Mechanical Engineering job openings:

Infographic showing various Senior Mechanical Engineering job openings in Riverside, CA as of August 2026, with employment types broken down into 89% Full Time, 7% Part Time, 3% Contract, and 1% Nights. Highlights an 88% Physical, 4% Hybrid, and 8% Remote job distribution, with an average salary of $127,867 per year, or $61.5 per hour.

Senior Mechanical Engineer - Fuel Systems

Quantum Fuel Systems LLC.

Lake Forest, CA โ€ข On-site

$120 - $140/hr

Other

Medical, Dental, Vision, Life, Retirement, PTO

Posted 23 days ago


Job description

Senior Mechanical Engineer

Quantum Fuel Systems / www.qtww.com

Reports to: Senior Vice President, Product Engineering

Location: Lake Forest, CA (onsite at company headquarters)

Employment type: Full-time

FLSA: Exempt

Pay Range: $120,000.00 - $140,000.00/year

Quantum Fuel Systems is engineering the future of alternative fuel solutions. For over 25 years, we've been at the forefront of clean energy innovation, designing, developing, and delivering industry-leading storage systems and transport trailers for compressed natural gas (CNG), renewable natural gas (RNG), and hydrogen.

Based in Lake Forest, California, we're driving clean energy forward by helping our partners meet ambitious net-zero targets with safe, reliable, and sustainable solutions. Our product line includes next-generation fuel storage systems for commercial vehicles and virtual pipeline trailers that offer industry-leading capacity with advanced composite technology.

We are seeking a talented and innovative Sr. Mechanical Engineer / Fuel Systems Engineering to join our team. This role will be pivotal in the development of new products, improvement of existing designs, and support of system design activities. The ideal candidate will have a strong background in mechanical engineering, experience with alternative fuel systems or related industries, and a passion for creating cutting-edge solutions that advance safety and performance in the alternative fuel sector and gas transportation. Additionally, this role will involve preparing specifications for hydrogen and CNG vehicle and transportation components and working with internal and external customers to design and configure components for various applications. Design, develop, test, and integrate high-pressure gaseous fuel components and systems for CNG and Hydrogen automotive, truck, and virtual pipeline applications.

  • Lead high-pressure component and system designs.
  • Generate and support design activities: DFMEA, ADVP&R, etc.
  • Evaluate, select, and qualify supplier products and services.
  • Outline and oversee or perform product verification and validation testing.
  • Support field services and failure root cause analyses.
  • Knowledge of material compatibility issues with hydrogen and natural gas.
  • Ability to apply a systematic and logical approach to engineering and design processes.
  • Perform analytic calculations, e.g., load and flow calculations.
  • Provide technical support and expertise to internal (e.g. operations, manufacturing, sales, service) and external customers.
  • Good communication skills, both verbal and written.
  • Strong documentation skills; test procedures, test reports, etc.
  • Lead and mentor Junior Mechanical Engineers.
  • Stay current with industry trends, emerging technologies, and best practices to drive continuous improvement and innovation in design processes.
  • Adopt and implement Quantum's Quality Assurance Procedures-QAP and Departmental Work Instructions-DWI.
Education and Experience: Required:

Bachelor of Science Degree in Mechanical Engineering + 5 yearsโ€™ experience. Master's degree is a plus.

Preferred:
  • Product development with high pressure components in automotive.
  • High pressure gaseous (hydrogen, CNG) system design and component selection.
  • Developing and implementing test procedures.
  • Software: CAD (NX Unigraphics preferred)
  • Large modular assemblies design
  • Strong understanding of mechanical design principles, materials selection (e.g. knowledge of material compatibility issues with hydrogen and natural gas), and manufacturing processes.
  • Knowledge of automotive industry standards and regulations related to alternative fuel systems.
  • Strong analytical and problem-solving skills, attention to detail, and ability to work in a fast-paced environment.
  • Effective communication skills and ability to collaborate with multidisciplinary teams.
  • Design for Manufacturing (DFM) concepts.
  • Familiar with control plans, FMEA, and GD&T.
Physical Job Requirements:

The employee will spend some of their time on the production floor. While performing the duties of this job, the employee may be required to stand for long periods of time, kneel, and crouch. In the office, the employee is regularly required to use their hands and fingers to operate a computer keyboard, mouse, and telephone keypad or to write, as well as talk and hear. Specific vision abilities required by this job include close vision, distance vision, peripheral vision, depth perception and ability to focus. This position involves occasionally lifting to 40 pounds.

EQUAL EMPLOYMENT OPPORTUNITY & AMERICANS WITH DISABILITIES ACT

Quantum Fuel Systems is an equal opportunity employer committed to fostering a diverse, inclusive, and accessible workplace. We celebrate diversity and are dedicated to creating an environment where all employees can thrive.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, breastfeeding, and related medical conditions), sexual orientation, gender identity, gender expression, national origin, ancestry, citizenship status, uniform service member and veteran status, marital status, pregnancy, age, protected medical condition, genetic information, disability, or any other characteristic protected by applicable federal, state, or local law.

In accordance with the Americans with Disabilities Act (ADA) and applicable state and local laws, Quantum Fuel Systems provides reasonable accommodations to qualified individuals with disabilities in all aspects of employment, including the application and interview process. If you require a reasonable accommodation to perform the essential functions of a job or to participate in the application process, please contact Human Resources at hr@qtww.com so that we may engage in the interactive process to identify an appropriate accommodation.

We will consider qualified applicants with criminal histories in a manner consistent with the requirements of the Los Angeles Fair Chance Ordinance and San Francisco Fair Chance Ordinance where applicable.

Benefits - What We Offer:
  • Comprehensive Health Coverage โ€“ Choose from 2 HMO or 2 PPO medical plans, plus dental, vision, and life insurance
  • Financial Benefits โ€“ 401(k) with company match and Flexible Spending Accounts (FSA)
  • Paid Time Off โ€“ Vacation, sick leave, and company holidays
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