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199 intern 2026 jobs at 47 companies in Fontana, CA

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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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3mo
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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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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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Supply Chain Intern Fall 2026
Long Beach, California, United States
$25/hr OnsiteInternship
Rocket Lab
Rocket LabNASDAQ: RKLB: Designs and builds launch vehicles and satellite systems.
0.25+ YOEEnrolled in a bachelor’s, master’s, or doctorate in engineering, supply chain, business, or operations; GPA ≥3.0; 3+ months supply-chain experience; available full-time onsite for ≥12 consecutive weeks beginning Aug/Sept 2026.
SQL, PowerBI
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1d
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Marketing Intern - Fall 2026
Los Angeles or Marina del Rey
OnsiteInternship
Boys Lie
Boys Lie: Sells women's streetwear and loungewear focused on empowerment.
College enrollment in good academic standing required. Requires marketing experience, video content creation and editing, social media proficiency, Google Suite and Dropbox skills, organization, teamwork, and multitasking.
Instagram, TikTok, Twitter, Pinterest, LinkedIn, Shopify, CapCut, Edits, Google Suite, Dropbox
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2mo
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Sales Management Trainee Intern - Fall 2026
Los Angeles, California, United States
$20/hr OnsitePart Time, Internship
Enterprise Mobility
Enterprise Mobility: Provider of vehicle rental and diverse mobility solutions.
0+ YOEPaid internship in sales management; prior sales/customer service/leadership experience; must be enrolled in a 4-year university, final semester; able to work in US; valid driver's license; 8-12 week commitment; 20-30 hours/week; starting Oct 2026.
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2mo
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Psychologist Intern for 2026-27
Anaheim, California, United States
OnsiteFull Time
Savanna School District
Savanna School District: Public school district providing elementary education in Orange County.
Enrolled in a graduate-level school psychology program; must hold a California internship credential with school psychologist authorization or a college/university letter of eligibility; DOJ fingerprint clearance; bilingual preferred.
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3mo
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VCA ASEC Specialty Intern 2026-27
Los Angeles, California, United States
$81k/yr OnsiteFull Time
VCA Animal Hospitals
VCA Animal Hospitals: Operates animal hospitals providing veterinary medicine and pet services.
Internship at VCA Animal Hospitals; full-time position with competitive compensation and benefits; location Los Angeles, CA; salary around $81,000 per year; Workday-based application process.
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3mo
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School Counselor Intern - Fall 2026
La Habra, California, United States
OnsiteInternship, Part Time
La Habra City School District
La Habra City School District: Operates public elementary and middle schools in Orange County.
Letter of introduction, resume, and proof of enrollment in a Pupil Personnel Services credential program; unpaid internship.
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Corporate Development Intern (Fall 2026)
Los Angeles or New York
$25/hr OnsitePart Time, Internship
Houlihan Lokey
Houlihan LokeyNYSE: HLI: Global investment bank providing financial advisory and restructuring services.
Must be a junior or senior pursuing a bachelor's (preferably Finance, Accounting, or Economics); basic financial modeling, Excel/PowerPoint/Word proficiency; strong communication; internship experience preferred; interest in investment banking or finance.
Salesforce, PitchBook, Microsoft Excel, Microsoft PowerPoint, Microsoft Word
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Corporate Development Intern (Fall 2026)
Los Angeles or New York
$25/hr OnsitePart Time, Internship
Houlihan Lokey
Houlihan LokeyNYSE: HLI: Provides global investment banking and financial restructuring advisory services.
Junior or senior bachelor’s student in finance/accounting/economics; basic financial modeling; strong Excel, PowerPoint, Word skills; analytical, written and verbal communication; self-starter; interest in investment banking or corporate development.
Salesforce, Pitchbook, Microsoft Excel, Microsoft PowerPoint, Microsoft Word
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6d
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Mechanical Engineering Intern (Fall 2026)
Tustin, California, United States
$20/hr OnsitePart Time, Internship
Salas O'Brien
Salas O'Brien: Provides integrated engineering design and technical consulting services.
Currently enrolled in an engineering bachelor's or master's program; CAD experience, strong communication, teamwork, adaptability, and willingness to work onsite or at project locations. Prior internship is optional.
CAD, AutoCAD, Revit
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External Affairs Intern (Fall 2026)
Los Angeles or Washington
$21/hr HybridFull Time, Internship
FWD.us
FWD.us: Advocating for bipartisan immigration and criminal justice reforms.
Interest in immigration and criminal justice reform; organized and detail-oriented; basic social media and digital content skills; available full-time M–F 9:30–5:30 for ≥4 months; Canva and video editing a plus.
Canva, Instagram, Facebook, LinkedIn, X/Twitter, Threads, Bluesky, YouTube
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Investment Banking Intern (Fall 2026)
Los Angeles, California, United States
OnsiteFull Time
ComCap
ComCap: Boutique investment bank advising the digital commerce and technology sectors.
Junior or senior undergraduate with 3.5+ GPA, US work authorization, financial modeling and Excel skills, PowerPoint familiarity, strong research and communication abilities.
Microsoft Excel, PowerPoint
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2mo
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Supply Chain Intern Fall 2026
Long Beach, California, United States
$25/hr OnsiteFull Time, Internship
Rocket Lab
Rocket LabNasdaq: RKLB: Operates launch vehicles and manufactures satellites for space missions.
0+ YOEEnrolled in a bachelor’s, master’s, or doctoral program in engineering, supply chain, or business; at least one semester remaining; GPA 3.0+; 3+ months in a corporate supply chain role.
SQL, PowerBI, 5S
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1d
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Theatrical Distribution Intern, Fall 2026
Los Angeles or New York City
$18/hr OnsiteMultiple Commitments Available
NEON
NEON: Distributes and produces independent films and award-winning cinema.
0+ YOECurrently enrolled undergraduate student; requires strong organization, analytical and written communication skills, Excel and Google Sheets proficiency, transportation, valid driver's license, and interest in independent film distribution.
Microsoft Excel, Google Sheets, Google Workspace, Google Docs, Gmail, Zoom, IMDbPro, Premiere, Photoshop
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4w
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Technical Intern, Advanced Analysis Fall 2026
Newport Beach, California, United States
$29-$37/hr OnsiteMultiple Commitments Available
Simpson Gumpertz & Heger
Simpson Gumpertz & Heger: Engineering firm specializing in structural design and building enclosures.
Current student in civil/structural engineering, materials science, architecture, or related field; strong academics; strong communication; interest in field and site work.
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2w
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Accounting Intern - Los Angeles, CA 2026
Los Angeles, California, United States
$27-$31/hr OnsiteMultiple Commitments Available
Gilbane Building Company
Gilbane Building Company: Global construction and facilities management services provider.
Currently enrolled in an accounting/finance degree, strong Excel/Word skills, analytical and communication skills, reliable transportation for occasional site travel.
Microsoft Excel, Microsoft Word
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Talent Acquisition Project Intern (E-Commerce) - 2026 Summer (BS/MS)
Los Angeles, California, United States
OnsiteFull Time, Internship
TikTok
TikTok: Global short-form video hosting and social media platform.
Currently pursuing a Bachelor's or Master's degree; strong communication, organization, and interest in technical recruiting; able to commit to a 6-month full-time summer internship in 2026.
LinkedIn Recruiter, GitHub, Stack Overflow
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3mo
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Public Affairs Intern (Unpaid - Fall 2026)
San Bernardino, California, United States
OnsiteInternship, Part Time
Planned Parenthood of Orange and San Bernardino Counties
Planned Parenthood of Orange and San Bernardino Counties: Regional provider of sexual and reproductive healthcare services.
Current undergraduate or graduate student; strong communication, organizing, and computer skills; bilingual English/Spanish preferred; reliable transportation and valid CA driver’s license if using personal vehicle; 1 semester commitment.
Microsoft Word, Microsoft Excel, Microsoft Outlook
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