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Mechanical Engineer Intern Jobs in Rialto, CA (NOW HIRING)

City of Yorba Linda

Engineering Intern

Yorba Linda, CA

$22.49 - $27.34/hr

The City of Yorba Linda is seeking a dependable, detail-oriented Engineering Intern to assist our busy engineering team. WHY JOIN THE CITY OF YORBA LINDA. At the City of Yorba Linda, you'll be part ...

City of Yorba Linda, CA

Engineering Intern

Yorba Linda, CA · On-site

$22.49 - $27.34/hr

  • Medical

  • PTO

The City of Yorba Linda is seeking a dependable, detail-oriented Engineering Intern to assist our busy engineering team. WHY JOIN THE CITY OF YORBA LINDA? At the City of Yorba Linda, you'll be part ...

Envista

CNC Programmer Intern

Yorba Linda, CA · On-site

$18.25 - $23.75/hr

  • Medical

  • Dental

  • Vision

  • Retirement

With coaching and close supervision, the intern will build foundational skills in CAM programming ... Education: - Currently pursuing a degree or certificate in Manufacturing Engineering, Mechanical ...

Envista Holdings Corporation

CNC Programmer Intern

Yorba Linda, CA · On-site

$18.25 - $23.75/hr

  • Medical

  • Dental

  • Vision

  • Retirement

With coaching and close supervision, the intern will build foundational skills in CAM programming ... Education: - Currently pursuing a degree or certificate in Manufacturing Engineering, Mechanical ...

Kirkhill Inc.

Rotation Summer Internship

Brea, CA · On-site

$20/hr

Manufacturing Engineer, Mechanical Engineer, Aerospace Engineer, and Materials Engineer. Kirkhill, Inc. CompetenciesCustomer Focus - Knows and understands the needs of internal and external customers.

Kirkhill Inc.

Rotation Summer Internship

Brea, CA

$17.25 - $22.50/hr

Manufacturing Engineer, Mechanical Engineer, Aerospace Engineer, and Materials Engineer. Kirkhill, Inc. Competencies * Customer Focus - Knows and understands the needs of internal and external ...

Tetra Tech, Inc.

Civil Engineer

Diamond Bar, CA · On-site

$90K - $130K/yr

  • Retirement

... mechanical, structural, construction, and field services. The pay scale for this position is $90K ... Mentoring of new and intern staff. Qualifications : * Bachelor's degree (B.S.) and/or master ...

Tetra Tech

Civil Engineer

Diamond Bar, CA

$90K - $130K/yr

  • Retirement

... mechanical, structural, construction, and field services. The pay scale for this position is $90K ... Mentoring of new and intern staff. Qualifications : * Bachelor's degree (B.S.) and/or master ...

Honor Plastics & Molding

Product Design Intern

Pomona, CA · On-site

$22 - $22.50/hr

Provides Engineering support to Sales for new projects. * Coordinate with sales team to meet with potential new customer to discuss project scope and realization. * Work with sales team to review ...

Honor Plastics & Molding

Product Design Intern

Pomona, CA · On-site

$22 - $22.50/hr

Provides Engineering support to Sales for new projects. * Coordinate with sales team to meet with potential new customer to discuss project scope and realization. * Work with sales team to review ...

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Showing results 21-40

All JobsMechanical Engineer Intern JobsMechanical Engineer Intern Jobs in Rialto, CA

Mechanical Engineer Intern information

See Rialto, CA salary details

$14

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$30

How much do mechanical engineer intern jobs pay per hour?

As of Aug 17, 2026, the average hourly pay for mechanical engineer intern in Rialto, CA is $21.94, according to ZipRecruiter salary data. Most workers in this role earn between $18.08 and $24.33 per hour, depending on experience, location, and employer.

What does a mechanical engineer intern do?

A Mechanical Engineer Intern assists professional engineers with the design, development, and testing of mechanical devices and systems. Their responsibilities often include creating CAD drawings, conducting research, performing calculations, and helping with prototyping or laboratory testing. Interns gain hands-on experience by supporting real engineering projects and working alongside experienced engineers. This position provides valuable exposure to engineering processes and workplace culture, making it a key step for students studying mechanical engineering.

What types of projects and responsibilities can a mechanical engineer intern expect during their internship?

As a Mechanical Engineer Intern, you'll typically assist with tasks such as CAD modeling, design analysis, prototype testing, and documentation of mechanical systems. Interns often collaborate closely with senior engineers and cross-functional teams, contributing to ongoing projects in product development or process improvement. While responsibilities can vary by company, you may also be involved in hands-on work in labs or workshops, attending team meetings, and learning to use industry-standard engineering tools. This exposure offers a valuable opportunity to develop both technical and teamwork skills in a real-world engineering environment.

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

To thrive as a Mechanical Engineer Intern, you need a strong grasp of engineering principles, mathematics, and problem-solving skills, typically supported by progress toward a mechanical engineering degree. Familiarity with CAD software (such as SolidWorks or AutoCAD), simulation tools, and basic manufacturing processes is often required. Strong teamwork, willingness to learn, and effective communication skills help interns collaborate and absorb feedback in a professional environment. These abilities are crucial for contributing meaningfully to engineering projects and developing technical expertise for future roles.

What is the difference between Mechanical Engineer Intern vs Mechanical Design Engineer?

AspectMechanical Engineer InternMechanical Design Engineer
Required CredentialsEnrolled in or recent graduate of Mechanical Engineering programBachelor's or higher in Mechanical Engineering or related field
Work EnvironmentInternship setting, often in engineering departments or labsFull-time engineering office or design studio
Employer & Industry UsageInternships offered by manufacturing, automotive, aerospace companiesDesign-focused roles in similar industries

The main difference between a Mechanical Engineer Intern and a Mechanical Design Engineer is experience and responsibility level. Interns are typically students gaining practical experience, while Mechanical Design Engineers are full-time professionals responsible for designing and developing mechanical systems.

Which internship is best for mechanical engineer interns?

The best internship for mechanical engineer interns typically involves companies or organizations that offer hands-on experience in design, manufacturing, or research, and often require knowledge of CAD software, MATLAB, or similar tools. Internships at engineering firms, manufacturing companies, or research institutions provide practical skills and industry exposure valuable for career development.

What are the most commonly searched types of Mechanical Engineer jobs in Rialto, CA?

The most popular types of Mechanical Engineer jobs in Rialto, CA are:

What cities near Rialto, CA are hiring for Mechanical Engineer Intern jobs?

Cities near Rialto, CA with the most Mechanical Engineer Intern job openings:

Mechanical Engineer Intern jobs near you
Infographic showing various Mechanical Engineer Intern job openings in Rialto, CA as of August 2026, with employment types broken down into 87% Full Time, 11% Part Time, 1% Contract, and 1% Nights. Highlights an 97% Physical, 1% Hybrid, and 2% Remote job distribution, with an average salary of $45,643 per year, or $21.9 per hour.

Quality Systems Engineer - Intern

Samuel, Son & Co (USA), Inc.

Fontana, CA • On-site

$23 - $26/hr

Full-time

Posted 14 days ago

Samuel, Son & Co. rating

8.2

Company rating: 8.2 out of 10

Based on 42 frontline employees who took The Breakroom Quiz

88th of 540 rated manufacturers

Job description


Responsibilities
  • Support the Quality department in daily quality assurance and continuous improvement activities.
  • Assist with the development, revision, and standardization of Quality Management System (QMS) documentation, including procedures, work instructions, forms, and visual aids.
  • Support Process Failure Mode and Effects Analysis (PFMEA), Control Plans, process flow diagrams, and related quality documentation.
  • Assist with internal quality audits, audit preparation, corrective action follow-up, and audit documentation.
  • Participate in quality improvement projects focused on process standardization, waste reduction, defect prevention, and operational efficiency.
  • Assist with quality data collection, documentation, and preparation of reports, metrics, and performance dashboards.
  • Support calibration activities, equipment records, and quality system compliance.
  • Assist with inspection method development, quality standards, and customer specification reviews.
  • Support the development of standardized work instructions, visual standards, and process documentation for manufacturing operations.
  • Collaborate with Quality, Engineering, Manufacturing, and Operations to identify opportunities for process improvements and implement corrective actions.
  • Participate in root cause investigations and continuous improvement initiatives using structured problem-solving methodologies.
  • Maintain project documentation and communicate project progress to Quality Management.
  • Ensure all assigned activities are performed in accordance with company safety, environmental, and quality requirements.
  • Perform other duties and project assignments as directed by Quality Management.Other duties as assigned
  • In process bachelor's degree in Engineering.

Education
  • In process bachelor's degree in Engineering.

Qualifications
  • Pursuing a Bachelor's degree in Mechanical, Industrial, Manufacturing, Materials, or related Engineering discipline.
  • Strong analytical and problem-solving skills.
  • Ability to interpret engineering drawings, technical documentation, and manufacturing specifications.
  • Proficiency in Microsoft Office applications, particularly Excel.
  • Strong organizational skills with attention to detail.
  • Effective verbal and written communication skills.
  • Ability to manage multiple projects in a fast-paced manufacturing environment.
  • Self-motivated with the ability to work independently and as part of a cross-functional team.
  • Knowledge of Quality Management Systems (ISO 9001), PFMEA, Control Plans, SPC, Lean Manufacturing, or Six Sigma is a plus.
  • Experience with AutoCAD, SolidWorks, Power BI, Minitab, GageTrak, or similar engineering/quality software is a plus.

The base pay range for this position is $23.00-$26.00. If you are hired, your base pay will be determined based on factors such as geographic location, skills, education, and/or experience. In addition to those factors, we believe in the importance of pay equity and consider internal equity of our current team members as part of any final offer. Please keep in mind that the range mentioned above is the full base pay range for the role.
About Us
At Samuel, we believe every team member brings unique and valuable skills, experiences and knowledge to our thriving business - enabling us to build on over 170 years of success in the metals industry. We offer countless opportunities for our team members to develop and grow in their careers, empower them to make decisions on the job and be a part of driving positive change - within our organization and in the communities where we live and work. If you're seeking a dynamic, supportive and welcoming workplace to make your mark and grow your career, we have the programs, culture and opportunities to make it happen. We're stronger together.
At Samuel we believe in a culture of equality. Respect and integrity are at our core. We are committed to building and creating an environment that is open and welcoming for everyone.
This job posting is for an existing vacancy within the organization
Samuel is an Equal Opportunity Employer. In the United States, we utilize E-Verify.
About the Team
Sierra Aluminum is a vertically integrated aluminum extrusion mill providing standard, custom and OEM aluminum products that range from basic mill finished extrusions all the way to finished, fabricated shapes. With in-house value added services such as anodizing, painting, thermal improvement, fabrication and specialized packaging, we ensure consistent quality products delivered on time.

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