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Internship Jobs in California

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Summer 2027 - College Internship – Palm Desert, CA (Housekeeping, Recreation, & Food & Beverage) Marriott Vacations Worldwide

Palm Desert, CA

Marriott Vacations Worldwide offers a comprehensive internship program at one of our stunning resort locations, available in 3- or 6-month durations, and built around the following core pillars: Gain in-person, on-site work experience within a designated department at one of our premier resort locations. Each vacation ownership product provides access to a variety of usage options — from an internal collection and an external exchange network of resorts; to hotels around the world; cruises, adventure travel, guided tours and more.

11 days ago

Summer 2027 - College Internship - Escondido, CA (Front Desk & Housekeeping) Hyatt Vacations Ownership

Escondido, CA

Hyatt Vacation Ownership offers a comprehensive internship program at one of our stunning resort locations, available in 3- or 6-month durations, and built around the following core pillars: . Interns who successfully complete the program will receive priority consideration for future career opportunities within Hyatt Vacation Ownership.

8 days ago

Outside Sales Internship - Summer 2027 Uline

Fremont, CA

Quick Apply

Learn alongside experienced Account Managers, sales trainers and department leaders who will support your development through weekly mentoring, team meetings and customer visits. As an Outside Sales Intern, spend your summer working side-by-side with sales professionals supported by the best training, tools and products to win in the field every day.

5 days ago

Part-Time Graduate Internship Johnson Service Group

San Jose, CA

Quick Apply

This person will be supporting water quality sampling, pilot studies, data analysis, QA/QC, outreach, and inter-agency coordination for advanced water purification and reuse projects including Pure Water Silicon Valley. Recent graduate or currently pursuing Master’s degree in Civil or Environmental Engineering, or related field currently.

5 days ago

Sales, Marketing & Business Development Internship Trumpf

Costa Mesa, CA

$20–$28 / hour

As a family-run, high-tech company with nearly 19,000 employees at 71 locations worldwide, we are looking for forward thinkers with unconventional ideas and drive to join our team. If you would like to contact us regarding the accessibility of our website or need assistance in completing the applications process, please contact our HR department at 860.255.6000 or at HRgeneral@us.trumpf.com.

10 days ago

2027 Select Sires, Inc. Internship - Global Marketing Select Sires Inc.

Visalia, CA

Quick Apply

Highly fertile semen and genetic consultation are provided by three farmer-owned and -controlled cooperatives domestically, while World Wide Sires, Ltd. Select Sires does not accept unsolicited resumes from recruiting agencies and will not pay a fee for any placement resulting from such submissions.

9 days ago

2027 Summer Internship Program - US Investing Sixth Street Specialty Lending, Inc.

San Francisco, CA

$95,000–$110,000 / year

Our firm is designed for cross-platform collaboration at scale: we build businesses, invest for growth, acquire assets, provide direct financing, identify value in public markets, purchase royalty streams, and regularly develop first-of-their-kind structures to meet the strategic objectives of management teams. Sixth Street Asset Based Finance focuses on asset/platform investing and origination across finance markets, including commercial and residential mortgages, renewables and energy finance, consumer asset classes, infrastructure debt, transportation, and commercial equipment.

12 days ago

2027 Summer Internship Program - US Investing Sixth Street Specialty Lending Inc

San Francisco, CA

$95,000–$110,000 / year

11 days ago

2027 Summer Internship (Technical) Palomar Holdings Inc

La Jolla, CA

Currently enrolled as an undergraduate (junior or senior year), a graduate student, pursuing a degree at an accredited college or university (preferred majors in Actuarial Science, Mathematics, Statistics, Engineering, Sciences, Economics, or Finance). Summer Internship Program Description: The Palomar Summer Internship Program provides college students and early career professionals with a unique opportunity to gain hands-on, technical experience exploring a career in the insurance industry.

8 days ago

2027 Summer Internship (General) Palomar Holdings Inc

La Jolla, CA

8 days ago

2027 Summer Internship (General) Palomar Holdings, Inc.

La Jolla, CA

Summer Internship Program Description: The Palomar Summer Internship Program provides college students and early career professionals with a unique opportunity to gain hands-on, technical experience exploring a career in the insurance industry. Delivering on our diversity commitment returns greater value to our shareholders and ultimately makes a positive impact to the communities in which we do business and to the people who live in them.

9 days ago

Activision 2027 Summer Internships - MBA Activision Publishing

Santa Monica, California

From evaluating technology investments and improving development pipelines to analyzing large-scale systems and driving operational efficiencies, you'll own meaningful projects with real business impact while gaining exposure to senior engineering and studio leadership, dedicated mentorship, and a global network of industry professionals. Whether you're building executive presentations, analyzing operational trends, supporting workforce planning, or improving internal processes, you'll help ensure the studios are equipped to deliver great game experiences for players while operating at their best.

30+ days ago

2027 Summer Internship - Bloom Energy Bloom Energy

San Jose, California

Our cutting-edge solutions enable unparalleled “time-to-power” capabilities, reliability, and sustainability, ensuring our customers remain ahead in a world where soaring energy demand and intensifying energy scarcity are rapidly becoming the new norm. For over two decades, we’ve been at the forefront of the global energy transition, pioneering solutions that empower critical industries to thrive in a rapidly digitizing, energy-intensive world.

30+ days ago

Summer 2027 Internship - Costa Mesa, CA - Sponsor Finance Tech Western Alliance Bancorp

Costa Mesa, CA

During this internship, you will be working with Western Alliance Bank's Sponsor Finance team, which provides debt financing solutions to support private equity-sponsored leveraged buyouts and acquisitions. In addition, you'll have the opportunity to bolster your business knowledge, learning the ins and outs of how successful companies operate and manage their finances, giving you invaluable hands-on experience to help grow your career!

4 days ago

2027 Summer Internship - Business Administration - Accounting/Finance (Pomona/Rosemead) Edison International

Rosemead, CA

Minimum Qualifications: Currently pursuing a Bachelor's Degree or higher in Business Administration - Accounting/Finance at an accredited institution with a graduation date of December 2027 or later. In this 12-week internship, you'll gain hands on experience with meaningful work while developing essential skills and building your professional network.

30+ days ago

Wonderful Scholar Summer Internship, Finance The Wonderful Company

Los Angeles, CA

$19–$20 / hour

Wonderful Pistachios & Almonds is part of The Wonderful Company, a privately held $4.8 billion company, which also has other No. 1 brands such as Wonderful Halos, FIJI Water, POM Wonderful, JUSTIN Wine, and Teleflora. Located in California's Central Valley, our nuts are Non-GMO Project Verified and sustainably harvested, providing a smart, healthy choice for consumers around the world.

30+ days ago

Summer 2027 Finance Internship Johnson & Johnson

Irvine, CA

$25.50–$28 / hour

All Job Posting Locations: Cincinnati, Ohio, United States of America, Danvers, Massachusetts, United States of America, El Paso, Texas, United States of America, Horsham, Pennsylvania, United States of America, Irvine, California, United States of America, Jacksonville, Florida, United States of America, New Brunswick, New Jersey, United States of America, Raritan, New Jersey, United States of America, Raynham, Massachusetts, United States of America, Spring House, Pennsylvania, United States of America, Warsaw, Indiana, United States of America, West Chester, Pennsylvania, United States of America. This internship is also a strong pipeline into Johnson & Johnson's Finance Leadership Development Program (FLDP), a 2.5 year rotational early-career program designed to help future finance leaders grow through hands-on roles, structured learning, and ongoing coaching.

30+ days ago

Summer 2027 Mars Veterinary Centers of America (VCA) Finance Internship Mars

Los Angeles, California

The base pay range for this position at commencement of employment is between the range listed below, however, base pay offered may vary depending on multiple individualized factors, including but not limited to job-related knowledge, skills, and experience. The Mars Compass , inspired by the Economics of Mutuality, is used to measure the company’s progress in service of its purpose; The world we want tomorrow starts with how we do business today.

9 days ago

Quantitative Developer - Systematic Strategies (Summer Internship) Balyasny Asset Management LP

San Francisco, CA

Bachelor's and Master's student graduating between Winter 2027 and Spring/Summer 2028 who are pursuing a degree in Computer Science, Software Engineering, Computer Engineering, or a related STEM discipline, with strong programming experience. Collaborate with quantitative researchers, quantitative developers, and business stakeholders to translate investment and operational requirements into practical technical solutions.

17 days ago

2027 Corebridge Financial Summer Internship Program - Actuary Corebridge Financial Inc

Woodland Hills, CA

$76,000–$84,000 / year

Corebridge Financial seeks candidates who have excelled in previous work experience, demonstrated outstanding academic and extracurricular achievement, possess strong analytical, quantitative, and interpersonal skills, and are enthusiastic about and committed to the insurance industry. Portfolio Analytics and Pricing Actuaries dedicated directly to support Corebridge Financials businesses are responsible for technical pricing, product development analytics, performance monitoring and measurement, and assessment of reinsurance needs.

30+ days ago

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Internship Jobs in California

Summer 2027 - College Internship – Palm Desert, CA (Housekeeping, Recreation, & Food & Beverage) Marriott Vacations Worldwide

Summer 2027 - College Internship - Escondido, CA (Front Desk & Housekeeping) Hyatt Vacations Ownership

Outside Sales Internship - Summer 2027 Uline

Part-Time Graduate Internship Johnson Service Group

Sales, Marketing & Business Development Internship Trumpf

2027 Select Sires, Inc. Internship - Global Marketing Select Sires Inc.

2027 Summer Internship Program - US Investing Sixth Street Specialty Lending, Inc.

2027 Summer Internship Program - US Investing Sixth Street Specialty Lending Inc

2027 Summer Internship (Technical) Palomar Holdings Inc

2027 Summer Internship (General) Palomar Holdings Inc

2027 Summer Internship (General) Palomar Holdings, Inc.

Activision 2027 Summer Internships - MBA Activision Publishing

2027 Summer Internship - Bloom Energy Bloom Energy

Summer 2027 Internship - Costa Mesa, CA - Sponsor Finance Tech Western Alliance Bancorp

2027 Summer Internship - Business Administration - Accounting/Finance (Pomona/Rosemead) Edison International

Wonderful Scholar Summer Internship, Finance The Wonderful Company

Summer 2027 Finance Internship Johnson & Johnson

Summer 2027 Mars Veterinary Centers of America (VCA) Finance Internship Mars

Quantitative Developer - Systematic Strategies (Summer Internship) Balyasny Asset Management LP

2027 Corebridge Financial Summer Internship Program - Actuary Corebridge Financial Inc

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