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Intern Jobs in Ontario, CA

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Winter Tax Intern Robert R. Redwitz & Co.

Irvine, CA

Throughout the experience, you will also develop a strong sense of expectations, professionalism, and work habits needed to succeed in the workplace, while observing firsthand how tax returns move through our systems and processes from start to finish. Interns will work closely with experienced tax professionals and gain exposure to our tax systems, processes, and workflow from start to finish.

30+ days ago

News and Creative Services Intern Fox Corp

Los Angeles, CA

FOX Television Stations owns and operates 29 full power broadcast television stations in the U.S. These include stations located in 14 of the top 15 largest designated market areas, or DMAs, and duopolies in 11 DMAs, including the three largest DMAs (New York, Los Angeles and Chicago). FOX Television Stations Los Angeles (KTTV/FOX 11 & KCOP/FOX 11 Plus) is seeking a motivated, curious, and collaborative Creative Services & News Intern for Summer 2026.

30+ days ago

Industrial Engineering Intern Endress+Hauser Group Services AG

Anaheim, CA

$23–$25 / hour

In this internship, you will support the Industrial Engineering team and collaborate with production employees, team leads, Quality, Maintenance, and other cross-functional partners on hands-on assignments that improve manufacturing processes. Whether developing and realizing new technology as a team, collaborating to build instrumentation, or strengthening vital relationships with countless global industries, we work to create trusted relationships that help everyone thrive.

9 days ago

Structural Engineering Intern Holmes US

Los Angeles, CA

$30–$35 / hour

We're part of the Holmes Group - 500+ people worldwide - which means you get the technical depth of a global firm alongside the culture of a West Coast practice where people actually know each other. We don't silo students into one project type or task, and we hear consistently that this is one of the things students value most about their internship experience.

26 days ago

Community Engagement Intern (Summer 2027) Zipline

Los Angeles, CA

Our customers include the world's largest and most prominent healthcare systems, governments, retailers, restaurants and global businesses who rely on us to save lives, reduce emissions, increase economic opportunity, and provide delivery from point A to point B as fast as possible. Today, Zipline operates on four continents, makes a delivery somewhere in the world every 30 seconds, and has completed millions of deliveries to date, including blood, vaccines, medical supplies, food, and retail products.

30+ days ago

Summer Internship Evonik Industries AG

Los Angeles, CA

$21–$27 / hour

Here are some examples of technical projects our previous Evonik summer interns have worked on: Process Engineering Intern: Contributed to the startup activities of a new chemical process, including updating procedures, redlining P&IDs, and creating Gantt charts to enhance process efficiency. Research & Development Intern: Engaged in the development of Evonik's Eudragit aqueous dispersion polymer coatings, which are used to provide a protective layer for pills, tablets, and capsules, effectively controlling the release and delivery of active pharmaceutical ingredients (APIs).

30+ days ago

Civil Engineering Intern Kimley-Horn and Associates Inc

Riverside, CA

$30–$31 / hour

Interns will learn one or more software programs specific to their disciplines: AutoCAD, Revit, Civil 3D, Excel, Microstation, VISSIM, Open Roads, Synchro and/or GIS. We take pride in how our employee retention, robust benefits package, and company values have led to Kimley-Horn's placement on the Fortune "100 Best Companies to Work" list for 19 years!

6 days ago

Construction Engineering Intern Flatiron Construction Corp

Chino, CA

In addition, you will assist the project manager, project engineer, and the rest of the on-site construction staff in the application of principles, methods, and techniques of engineering technology by performing any combination of the following duties at a project job site. FlatironDragados'' Intern Program provides challenging and rewarding work opportunities for college students majoring in Civil Engineering, Mechanical Engineering and Construction Management.

30+ days ago

Data Science/ Data Engineer Intern Hadrian

Los Angeles, CA

$46.15–$50.71 / hour

Backed by leading investors including JPMorgan Chase, Valor Equity Partners, Andreessen Horowitz, Founders Fund, 137 Ventures, Lux Capital, T. Rowe Price, and Morgan Stanley, we're building the future of American manufacturing-and looking for exceptional people to help make it happen. Series D at a $7.87B valuation, Hadrian is rapidly expanding our manufacturing footprint, launching new capabilities across welding, casting, forging, electronics, additive manufacturing, and more, while scaling our Factory-as-a-Service platform to transform how critical products are built.

30+ days ago

Simulation Software Engineering Internship (Spring or Summer 2027) Apex Technology

Los Angeles, California

Simulation Software Engineering: Interns will contribute to developing closed-loop spacecraft test platforms, such as six degrees of freedom simulation platform (6DOF), software-in-the-loop (SITL) and hardware-in-the-loop (HITL) and executing simulation testing strategies to validate and verify the performance, functionality, and reliability of satellite systems. To be eligible for this role, applicants must either (1) qualify as a U.S. Person, meaning a U.S. citizen or national, a lawful permanent resident (green card holder), a refugee admitted under 8 U.S.C. § 1157, or an individual granted asylum under 8 U.S.C. § 1158, or (2) be able to obtain the required export authorizations from the U.S. Department of State, the U.S. Department of Commerce, or another applicable U.S. government agency.

30+ days ago

Design Engineering Intern Nuclear Promise X

Ontario, CA

$26–$31 / hour

You'll help resolve emergent issues, perform engineering calculations and analyses, support maintenance and procurement activities, and assist with minor design changes. We combine decades of nuclear expertise with AI, digital tools, and lean processes, to help plants run safer, smarter, and more cost-effectively.

24 days ago

Subcontracts Business Operations (Academic Part Time Intern) Jet Propulsion Laboratory

Pasadena, CA

Contribute to the issuance and management of subcontracts, assist subcontract managers, and ensure timely close-out activities. Ideal for undergraduate students in Business Administration or related fields seeking hands-on experience in a collaborative environment.

19 days ago

CAD Intern (Hourly) Austin Community College District

Highland, California

This report includes statistics from the previous three years concerning reported crime that occurred on campus; public property adjacent to and accessible from campus; and in certain non-campus buildings/property owned or controlled by ACC. We promote student success and community development by providing affordable access, through traditional and distance learning modes, to higher education and workforce training, including appropriate applied baccalaureate degrees, in our service area.

10 days ago

Electrical Engineering Intern MEP Kimley-Horn and Associates Inc

Orange, CA

$33–$34 / hour

We take pride in how our employee retention, robust benefits package, and company values have led to Kimley-Horn's placement on the Fortune "100 Best Companies to Work" list for 19 years! Solve complex problems, assist project managers, and collaborate across disciplines to produce our clients' visions for the future built environment.

25 days ago

Structural Engineering Intern - Buildings (Summer 2027) Stantec Inc

Los Angeles, CA

$23.47–$34.50 / hour

Primary Location: United States | CA | Los Angeles Organization: BC-2045 Buildings-US California Engineering Employee Status: Temporary Management Level: Internship Business Justification: New Position Travel: No Schedule: Full time Job Posting: 14/10/2026 08:10:37 Req ID: 1008287. We take an innovative, collaborative approach to projects, sharing a common belief that sustainable design for the built environment can make the world a better place for future generations.

3 days ago

Transportation Marketing Intern HDR Inc

Irvine, CA

$22–$26 / hour

States-California-Irvine'',''United States-California-Irvine'',''United States-California-Los Angeles'',''United States-California-Los Angeles'','''','''','''','''','''','''',''Highway + Road'',''Highway + Road'',''Part-time'',''Part-time'',''Temporary'',''Temporary'','''','''',''Marketing and Admin'',''Marketing and Admin'',''Aug 28, 2026'',''Aug 28, 2026'',''false'',''790513'',''790513'',''true'',''790513'',''false'',''Submission for the position: Transportation Marketing Intern - (Job Number: 195779)'',''false'',''790513'',''false'',''true''. '',''We provide a comprehensive benefits package that promotes employee ownership, employee health, performance, and success, which includes medical, dental, vision, short and long-term disability, life insurance, an employee assistance program, paid time away, parental leave, paid holidays, a retirement savings plan with employer match, employee referral bonus and tuition reimbursement.

30+ days ago

Audit Intern - Japanese Bilingual SingerLewak LLP

Los Angeles, CA

$26–$30 / hour

The firm takes pride in client service and professional and personal advancement, as demonstrated by our SL forward program which promotes a culture of learning and growth through targeted development and leadership programs and SL Cares, together with a continual focus on client service and technological evolution. Providing the services of a large firm with a blended environment of practices, services and industry specializations, SingerLewak continues to demonstrate renowned industry leadership year-over-year.

30+ days ago

Regulatory Affairs Intern Johnson & Johnson

Irvine, CA

$23.50–$52.50 / hour

In addition to projects that will provide maximum experience and exposure in your desired field our team provides opportunities to learn more about the company, network with leadership, and develop the skills needed to succeed in a global organization. Students currently on CPT, OPT, or STEM OPT usually requires future sponsorship for long term employment and do not meet the requirements for this program unless eligible for an alternative long-term status that does not require company sponsorship.

4 days ago

Electrical Engineering Intern (Summer 2027!) CDM Smith

Los Angeles, California

Temporary

In addition, during employment individuals may be required by CDM Smith or a CDM Smith client to successfully complete additional background checks, including motor vehicle record as well as drug testing. Background Check and Drug Testing Information: CDM Smith Inc. and its divisions and subsidiaries (hereafter collectively referred to as “CDM Smith”) reserves the right to require background checks including criminal, employment, education, licensure, etc.

30+ days ago

Tax Intern SingerLewak LLP

Irvine, CA

$26–$30 / hour

24 days ago

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Intern Jobs in Ontario, CA

Winter Tax Intern Robert R. Redwitz & Co.

News and Creative Services Intern Fox Corp

Industrial Engineering Intern Endress+Hauser Group Services AG

Structural Engineering Intern Holmes US

Community Engagement Intern (Summer 2027) Zipline

Summer Internship Evonik Industries AG

Civil Engineering Intern Kimley-Horn and Associates Inc

Construction Engineering Intern Flatiron Construction Corp

Data Science/ Data Engineer Intern Hadrian

Simulation Software Engineering Internship (Spring or Summer 2027) Apex Technology

Design Engineering Intern Nuclear Promise X

Subcontracts Business Operations (Academic Part Time Intern) Jet Propulsion Laboratory

CAD Intern (Hourly) Austin Community College District

Electrical Engineering Intern MEP Kimley-Horn and Associates Inc

Structural Engineering Intern - Buildings (Summer 2027) Stantec Inc

Transportation Marketing Intern HDR Inc

Audit Intern - Japanese Bilingual SingerLewak LLP

Regulatory Affairs Intern Johnson & Johnson

Electrical Engineering Intern (Summer 2027!) CDM Smith

Tax Intern SingerLewak LLP

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