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Junior Mechanical Engineer Jobs in Riverside, CA

Mechanical Engineer

Tustin, CA · On-site +1

$70K - $110K/yr

Mechanical Engineer (Early Career) At Salas O'Brien we tell our clients that we're engineered for impact. This passion for making a difference applies just as much to our team as it does to our ...

Mechanical Engineer

Tustin, CA · On-site

$70K - $110K/yr

Mechanical Engineer (Early Career) At Salas O'Brien we tell our clients that we're engineered for impact. This passion for making a difference applies just as much to our team as it does to our ...

We bring together mechanical, electrical, structural, and civil engineering experts to solve complex design challenges with precision, creativity, and collaboration. Whether you're optimizing energy ...

Mechanical Engineer

Tustin, CA · On-site

$70 - $110/hr

Job Summary The entry level Mechanical Engineer will support the design and delivery of mechanical systems for healthcare and other complex facilities. This role focuses on technical execution ...

Mechanical Engineer - Pharmaceutical Manufacturing This role supports high-volume pharmaceutical manufacturing operations focused on IV bag production. The Mechanical Engineer provides hands-on ...

We bring together mechanical, electrical, structural, and civil engineering experts to solve complex design challenges with precision, creativity, and collaboration. Whether you're optimizing energy ...

Mechanical Engineer

Irvine, CA · On-site

$153 - $187/hr

Position Overview A Mechanical Engineer is sought by a new-techelectric RV design company in Orange County, CA to perform the following duties: Key Responsibilities * Conduct concept development and ...

New

Thermal/Mechanical Engineer Location: California Reports To: Vice President, Systems Engineering Salary Range: $150,000 - $170,000 Overview We are seeking a highly skilled Thermal/Mechanical Engineer ...

Thermal/Mechanical Engineer Location: California Reports To: Vice President, Systems Engineering Salary Range: $150,000 - $170,000 Overview We are seeking a highly skilled Thermal/Mechanical Engineer ...

Thermal/Mechanical Engineer Location: California Reports To: Vice President, Systems Engineering Salary Range: $150,000 - $170,000 Overview We are seeking a highly skilled Thermal/Mechanical Engineer ...

The Staff Mechanical Engineer supports new product development and sustaining engineering ... and mentors junior engineers. Ideal candidates bring strong project management experience ...

Mechanical Engineer

Irvine, CA · On-site

$110 - $150/hr

TP-Link Systems Inc. is seeking a talented and driven Mechanical Engineer to join our team. In this role, you will own the mechanical system architecture (internal layout, construction strategy, and ...

TP-Link Systems Inc. is seeking a talented and driven Mechanical Engineer to join our team. In this role, you will own the mechanical system architecture (internal layout, construction strategy, and ...

Showing results 41-60

Junior Mechanical Engineer information

See Riverside, CA salary details

$42.8K

$76.3K

$102.2K

How much do junior mechanical engineer jobs pay per year?

As of Sep 3, 2026, the average yearly pay for junior mechanical engineer in Riverside, CA is $76,306.00, according to ZipRecruiter salary data. Most workers in this role earn between $66,200.00 and $86,100.00 per year, depending on experience, location, and employer.

What is a junior mechanical engineer?

A junior mechanical engineer works with a team of other engineers and supervisors to help design, build, and test machines and equipment. These professionals often work in manufacturing firms and research institutions and specialize in a specific field, such as biotechnology, consumer electronics, or automobile manufacturing. As a junior mechanical engineer, your duties may include finalizing blueprints, acquiring materials, creating prototypes, and resolving mechanical problems. To become a junior mechanical engineer, you typically need at least a bachelor’s degree in mechanical engineering and formal training. Candidates usually enter the field as assistants to other junior mechanical engineers in order to gain work experience and learn elements of product design, development, and testing. You may also pursue voluntary certification to demonstrate your skills as a professional and improve your job prospects.

What does a junior mechanical engineer do?

A Junior Mechanical Engineer assists in designing, developing, and testing mechanical devices and systems under the supervision of senior engineers. Their responsibilities often include creating technical drawings, running simulations, conducting experiments, and preparing reports. They typically work as part of a team and may also help with troubleshooting and improving existing products or processes. This role provides valuable hands-on experience and is a common entry point for recent engineering graduates.

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

To excel as a Junior Mechanical Engineer, you need a solid grasp of engineering fundamentals, CAD design, and problem-solving skills, typically supported by a bachelor's degree in mechanical engineering. Familiarity with industry-standard software such as SolidWorks, AutoCAD, and simulation tools, as well as knowledge of manufacturing processes, is often required. Strong teamwork, attention to detail, and effective communication set outstanding candidates apart. These competencies ensure the ability to contribute to design projects, support innovation, and maintain quality in engineering solutions.

What are some typical projects and responsibilities a junior mechanical engineer can expect during their first year?

As a Junior Mechanical Engineer, you can expect to work on a variety of tasks such as assisting with the design and drafting of mechanical components, performing basic calculations, creating and revising CAD models, and supporting senior engineers with testing and prototype assembly. You'll often collaborate with cross-functional teams, including manufacturing and quality assurance, to ensure that designs meet project requirements and standards. It's common to be assigned to smaller sections of larger projects, giving you exposure to different aspects of mechanical engineering while building your technical and teamwork skills.

What is the difference between Junior Mechanical Engineer vs Mechanical Designer?

AspectJunior Mechanical EngineerMechanical Designer
Required CredentialsBachelor's in Mechanical Engineering or related fieldBachelor's in Mechanical Engineering, Mechanical Design, or related field
Work EnvironmentEngineering firms, manufacturing, R&DDesign departments, engineering firms, manufacturing
Employer & Industry UsageUsed across engineering and manufacturing sectorsPrimarily in design and product development roles

Junior Mechanical Engineers and Mechanical Designers often share educational backgrounds and work in similar environments. While Junior Mechanical Engineers focus on applying engineering principles to projects, Mechanical Designers specialize in creating detailed designs and CAD models. Both roles are essential in product development and manufacturing industries, with overlapping skills but different primary responsibilities.

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

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

What cities near Riverside, CA are hiring for Junior Mechanical Engineer jobs?

Cities near Riverside, CA with the most Junior Mechanical Engineer job openings:

Infographic showing various Junior Mechanical Engineer job openings in Riverside, CA as of August 2026, with employment types broken down into 43% Full Time, 14% Part Time, and 43% Contract. Highlights an 100% In-person job distribution, with an average salary of $76,306 per year, or $36.7 per hour.

Mechanical Engineer

Salas O'Brien, Inc.

Tustin, CA • On-site, Remote

$70K - $110K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 20 days ago


Salas O'Brien rating

8.2

Company rating: 8.2 out of 10

Based on 13 frontline employees who took The Breakroom Quiz

164th of 452 rated engineering


Job description

Mechanical Engineer (Early Career)

At Salas O’Brien we tell our clients that we’re engineered for impact. This passion for making a difference applies just as much to our team as it does to our projects. That’s why we’re committed to living our values every day: inspiring, achieving, and connecting as shared owners of our success with a focus on a sustainable future.

Building for the long-term means that all of our team members can expect to work on amazing projects with a people-first approach to problem solving. It also means that each member of our team has truly limitless potential to build a unique, meaningful, and high-impact career—and they’ll receive great total rewards along the way.

About Us:

Founded in 1975, Salas O’Brien is an employee-owned engineering and professional services firm focused on achieving impact for our clients, our team, and the world. We know that tomorrow’s requirements are today’s opportunities, and we are here to design lasting solutions for pressing challenges.

We work across a variety of industries providing integrated engineering and consulting services. Our specialized experience includes design for data centers, healthcare, science and technology, high-rise buildings, clean energy, education, and other building types as well as structural and building sciences, infrastructure asset management, advanced robotics, and more.

Our technical expertise is paired with an exceptional team of business development, human resources, finance and accounting, information technology, and marketing professionals, all of whom play a key role in bringing our commitments to life every day.

Job Summary:

The entry level Mechanical Engineer will support the design and delivery of mechanical systems for healthcare and other complex facilities. This role focuses on technical execution, coordination with multidisciplinary teams, and contributing to high-quality project outcomes. The successful candidate will apply engineering fundamentals, develop technical documentation, and support project delivery while continuing to build expertise in mechanical design for healthcare, institutional, and industrial projects.

Responsibilities:

  • Develop HVAC system designs of a given project based on scope of work and/or client RFPs .
  • Provide engineering design, evaluation, and planning of mechanical systems for healthcare, life sciences, higher education, and data center market types.
  • Conduct existing building surveys and documentation of existing HVAC systems.
  • Develop system design calculations and selection of equipment for use in buildings.
  • Prepare detailed design documents, reports, and studies.
  • General knowledge of project specifications and editing techniques.
  • General knowledge of California code requirements, including California Building Code (CBC) and HCAI-specific requirements.
  • Complete code compliance research.
  • Coordinate work with other disciplines.
  • Provide construction administration services.

Skills:

  • Proficiency in using engineering tools and software including Autodesk software (Revit, Navisworks).
  • Ability to perform HVAC load calculations utilizing Energy Soft and Trace energy modeling software.
  • Flexibility and willingness to work on various projects and tasks, embracing new challenges with enthusiasm.
  • Demonstrated ability to work independently and take initiative to drive projects forward.

 Team Contribution & Development:

  • Collaborate with senior engineers and project managers to deliver projects on schedule and within scope.
  • Support proposal development and technical input for projects as needed.
  • Participate in knowledge sharing and continuous improvement of design standards and best practices.
  • Contribute to a positive team environment through effective communication and collaboration.
  • Continue to build technical expertise in specialized mechanical systems.

 Qualifications:

  • Bachelor's degree in Mechanical Engineering.
  • 2-5 years experience in Mechanical Engineering.
  • Registration as EIT or PE preferred.

Location:

  • Tustin, CA (on-site with remote half day on Fridays)

Travel:

  • Up to 25%

Compensation & Benefits:

Salas O’Brien health and welfare benefits are designed to invest in you, and in the things you care about. Your health. Your well-being. Your security. Your future. Team members have access to medical, dental, vision, and basic life insurance, a 401(k) plan, and the ability to purchase company stock at a discount.  Salas O’Brien has both U.S. and Canadian (PTO) plans for full-time salaried, exempt and non-team members, 10 paid holidays, and paid leave programs for military service and new parents. And certain roles may be eligible for additional rewards, including merit increases, performance discretionary bonus, and stock.

The base salary range for this position is $70,000 to $110,000. Within the range, individual pay is determined by work location and additional factors, including job-related skills, experience, and relevant education or training.

Equal Opportunity Employment Statement

Salas O’Brien provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state/provincial, or local laws. Salas O’Brien will accommodate the disability-related needs of applicants as required by law.


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