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1,871 intern jobs at 840 companies in Ontario, CA

1mo
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Intern to Intern Conversion – Business Functions (All) (Summer 2026 Intern Program)
Everett or Huntsville or Charleston or Tinker Air Force Base or Oklahoma City or Berkeley or Huntington Beach or Hazelwood or Germantown or El Segundo or China Lake or Arlington or Ridley Park or Tukwila or North Charleston or Kennedy Space Center or Fairfax or Houston or Colorado Springs or Chicago or Long Beach or Renton or Saint Louis or Dallas or Seattle or Auburn or Philadelphia or San Antonio or Kent or Mesa
$38k-$64k/yr OnsiteFull Time, Internship
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, satellites, and defense systems.
Must be enrolled in a bachelor's or higher program (graduation on/after Aug 2027), be available full-time for a 10-12 week Summer 2027 internship, and have previously interned with Boeing.
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2mo
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Pharmacy Intern
Alhambra, California, United States
$16-$22/hr OnsitePart Time
CVS Health
CVS HealthNYSE: CVS: Provides retail pharmacy, health insurance, and pharmacy benefit management services.
Active Pharmacy Intern license in the employment state; not on the DEA Excluded Parties List; no pending felony related to controlled substances; currently enrolled in a School of Pharmacy.
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2d
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Pharmacist Intern
Covina, California, United States
$24-$26/hr OnsitePart Time
Polaris Pharmacy Services
Polaris Pharmacy Services: Provide pharmacy services to long-term care and correctional facilities
Active pharmacist intern license in state of practice, pharmacy doctorate candidacy preferred, prior pharmacy experience preferred, ability to prepare prescription medications, flexible hours, strong communication, Microsoft Office skills.
Microsoft Word, Microsoft Excel, Microsoft Outlook
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2mo
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Intern
Rancho Dominguez, California, United States
$20-$25/hr OnsiteFull Time
The Brock Group
The Brock Group: Provides specialty craft and maintenance services for industrial facilities.
0+ YOEInternship for construction management/engineering students; organized, detail-oriented; able to learn quickly; supports various project teams.
Microsoft Office, Bluebeam, Primavera, MS Project
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1mo
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Intern
Rancho Cucamonga, California, United States
OnsiteInternship
Hillside Community Church
Hillside Community Church: Religious institution providing worship services and community programming.
Internship providing ministry training and leadership development; plan and execute events, foster community connections; 10–20 hours/week from late Aug 2026 to early May 2027.
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2w
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Intern
Monrovia, California, United States
$21-$30/hr OnsitePart Time
San Gabriel Valley Council of Governments
San Gabriel Valley Council of Governments: Regional government planning agency serving the San Gabriel Valley.
Currently enrolled or recently graduated college students in related fields; experience with Microsoft Office/Excel; interest or coursework in engineering, project management, procurement, or data analysis; able to lift 25 lbs.
Microsoft Excel, Microsoft Word, Power BI, SharePoint, GIS
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3mo
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Intern
Santa Ana, California, United States
OnsiteMultiple Commitments Available
Fellowship of Christian Athletes
Fellowship of Christian Athletes: Provides Christian ministry and mentorship to athletes and coaches.
Internship for student athletes; unpaid position (may receive a nominal living stipend); summer or semester program; not an employee.
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1mo
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Intern
Pasadena, California, United States
$18-$25/hr OnsitePart Time, Internship
Morgan Stanley
Morgan StanleyNYSE: MS: Provides global investment banking, wealth management, and advisory services.
High school diploma required; pursuing college degree preferred. Must be 18+, internship up to 10 months. Strong communication, teamwork, analytical skills and interest in global wealth management.
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2w
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Intern
Pasadena, California, United States
$60k-$77k/yr OnsitePart Time
UBS
UBSSIX Swiss Exchange: UBSG: Global bank providing wealth management and investment services.
Enrolled in a two- or four-year college; strong academic record and campus involvement; interest in wealth management; analytical, communication and teamwork skills.
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2mo
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PHARMACY/PHARMCST-INTERN
Hollywood, California, United States
OnsitePart Time
The Kroger Co.
The Kroger Co.NYSE: KR: Operates supermarkets, pharmacies, and jewelry stores across America.
Actively enrolled in a US school of pharmacy; holds a current state Pharmacy Intern license.
pharmacy computer system
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2mo
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HR Intern - US
Los Angeles, California, United States
$18/hr OnsiteInternship
Pixi
Pixi: Develops and sells botanically-infused skincare and makeup products.
0+ YOEEntry-level HR intern pursuing Bachelor's in Business/HR; strong communication, organized, team player with problem-solving ability.
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2mo
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Counselor Intern Fall 2026
Fullerton, California, United States
OnsiteFull Time
Fullerton Joint Union High School District
Fullerton Joint Union High School District: Operates public high schools and secondary education programs.
University letter indicating eligibility for Counseling intern experience
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1mo
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BY REFERRAL ONLY - INTERN 2026-2027
San Bernardino, California, United States
OnsitePart Time, Internship
San Bernardino County Superintendent of Schools
San Bernardino County Superintendent of Schools: Provides educational leadership and support services to school districts.
Internal candidates only; invitation from SBCSS HR required. Part-time internship for the 2026-2027 year (120 days).
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1mo
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Pharmacy Intern - Weekends
Los Angeles, California, United States
$37/hr OnsiteTemporary
UCLA Health
UCLA Health: Provides comprehensive hospital services and academic medical research.
Enrollment in PharmD program and CA pharmacy intern license required; ability to perform pharmaceutical calculations, prepare IV/chemotherapy sterile compounding, computer order entry, and lift/push up to 50 lbs. 2 years inpatient experience preferred.
Pyxis medstations
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3mo
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Intern - Engineering
Irvine, California, United States
$19-$22/hr OnsiteInternship, Part Time
Transportation Corridor Agencies
Transportation Corridor Agencies: Operates and maintains public toll roads in Orange County.
0+ YOEJunior/senior undergrad or graduate student in civil/transportation/environmental engineering; GPA 2.5+; strong MS Office; basic reading of drawings; eager to learn; no prior experience required.
Microsoft Office, AutoCAD, GIS
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2mo
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PIP Intern
Whittier, California, United States
$16/hr OnsitePart Time
SEP United
SEP United: Provides vocational support services for individuals with disabilities.
Internship involving assisting departments, supporting projects, research, data analysis, and administrative tasks.
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4d
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Intern, Project
Commerce, California, United States
HybridPart Time
AltaMed
AltaMed: Provides comprehensive healthcare services to underserved Southern California communities.
Bilingual English/Spanish required; experience in patient education or healthcare; familiarity with social determinants of health; bachelor\u0002s degree preferred; available 29 hours/week; reliable transportation; ability to use EHR.
Electronic Health Record (EHR)
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1w
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Fall 2026 Intern, Properties (LA)
West Hollywood, California, United States
$20/hr HybridInternship, Part Time
Excel Sports Management
Excel Sports Management: Professional sports agency representing athletes and corporate brands.
Fall semester paid internship, 24-29.9 hours/week, hybrid with ~3 days in-office; must have senior standing in college, be enrolled in graduate school, or hold a bachelor’s/postgraduate degree; interns provide own transportation and housing.
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3mo
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School Psychologist Intern
Fullerton, California, United States
OnsiteFull Time
Fullerton School District
Fullerton School District: Provides public K-8 educational and student support services.
Credential copy, enrollment in PPS School Psychologist Intern Program, Masters in educational psychology and special education; bilingual Spanish or ABA experience preferred.
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1w
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Communications Intern (Unpaid Intern)
Santa Ana, California, United States
OnsiteInternship
County of Orange
County of Orange: Provides essential public services to Orange County residents.
Must be 18+, commit 15–20 hours/week for 3+ months (Tues–Thurs 8am–5pm preferred), pass interview and Live Scan, provide resume/cover letter, positive attitude and willingness to learn.
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