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24 research intern jobs at 23 companies in Menifee, CA

3mo
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Research Intern
Carlsbad or New York
OnsiteFull Time, Internship
Gemological Institute of America
Gemological Institute of America: Provides gemstone grading, gemology education, and scientific research services.
Actively enrolled in a bachelor’s or graduate degree program; gemology or related science preferred.
MS Office
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1mo
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Equity Research Intern
Newport Beach, California, United States
OnsiteInternship
Roth Capital Partners
Roth Capital Partners: Investment banking and research services for growth companies
Post-grad internship in-office in Newport Beach; analytical skills, financial modeling, MS Office (Excel, PowerPoint), strong writing and communication; able to work flexible schedule.
Microsoft Office, Microsoft Excel, Microsoft PowerPoint, Internet
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1mo
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ESG Intern
Elizabethtown or Riverside or Asheboro
$20-$25/hr HybridFull Time, Internship
Westfall Technik
Westfall Technik: Global provider of integrated plastics manufacturing and tooling solutions.
Currently pursuing a bachelor’s or master’s in environmental/sustainability field; strong analytical, research, organizational, and communication skills; proficiency with Microsoft Office; interest in ESG frameworks and sustainability reporting.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, EcoVadis, CDP, SBTi, GHG Protocol
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3w
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Marketing Intern
Chino, California, United States
$20-$24/hr OnsitePart Time
Chino Commercial Bank
Chino Commercial BankOTC Markets: CCBC: Provides community-focused personal and business banking and lending services.
Support social media, create digital content and graphics, assist campaign execution, conduct market research, and maintain marketing assets. Requires strong communication, organization, and design aptitude.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Canva, Adobe Creative Suite
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2d
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Administrative Intern
Glendora, California, United States
$22-$26/hr OnsitePart Time, Temporary
City of Glendora
City of Glendora: Providing municipal governance and community services to Glendora residents.
High school graduation or equivalent plus at least two years of college in business, political science, public administration, or a related field. Requires MS Office Suite experience and strong communication, research, and customer service skills.
Microsoft Office Suite, Microsoft Excel, Microsoft Word, Microsoft Outlook
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1w
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Intern - Water Use Efficiency
Fountain Valley, California, United States
$24-$33/hr OnsitePart Time
Municipal Water District of Orange County
Municipal Water District of Orange County: Wholesale water provider and regional resource planning agency.
Enrolled college student; high school diploma/GED; basic knowledge of water use efficiency beneficial; able to perform research, use office software, communicate clearly, and handle occasional physical tasks up to 25 lbs.
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2mo
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Firmware Engineer Intern
Irvine, California, United States
OnsiteInternship
Fluxergy
Fluxergy: Portable diagnostic platform for rapid point-of-care laboratory testing
0+ YOEEnrollment in a Bachelor’s or Master’s program; 30-40 hours/week; proficiency in C/C++; RTOS exposure; strong problem-solving and communication skills.
C/C++, RTOS, Git, Embedded systems
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4w
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Land Acquisition Intern
Irvine, California, United States
$19-$20/hr OnsiteInternship, Temporary
City Ventures
City Ventures: Develops energy-efficient residential communities in California urban markets.
Pursuing or holding a bachelor's in related field; interest in residential real estate; strong analytical, research, organizational, and communication skills; Microsoft Excel proficiency.
Microsoft Excel
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3d
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Seasonal HR Intern
Ontario, California, United States
$13-$52/hr OnsiteMultiple Commitments Available
UPS
UPSNYSE: UPS: Global provider of package delivery and supply chain logistics.
Recent human resources management graduate or equivalent with Microsoft Office proficiency, strong communication, research, organization, confidentiality, and employment law knowledge preferred.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Access
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4w
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Land Acquisition Intern
Irvine, California, United States
$20/hr OnsiteInternship, Temporary
City Ventures
City Ventures: California-based residential homebuilder and urban infill developer.
Pursuing or holding a bachelor’s in a related field, interest in residential real estate, strong analytical and research skills, Microsoft Excel proficiency, ability to manage deadlines and present findings.
Microsoft Excel
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2d
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Intern - EHS
Garden Grove, California, United States
$18-$22/hr OnsiteMultiple Commitments Available
Valence Surface Technologies
Valence Surface Technologies: Provides surface finishing and chemical processing for aerospace components.
High school diploma or GED required; proficiency in Microsoft Office, data entry, research, communication, safety awareness, and technical problem-solving. Must wear PPE and meet ITAR requirements.
Microsoft Office, Personal Protective Equipment (PPE)
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4w
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Beverage Application Intern (6 months)
Laguna Beach, California, United States
$17/hr OnsiteInternship
Symrise
SymriseFrankfurt Stock Exchange: SY1: Global supplier of fragrances, flavors, and cosmetic ingredients.
Pursuing BS/MS in Food Science, Biology, Chemistry or related; commute to Laguna Beach; basic lab equipment use; hazardous material awareness; strong time management and communication.
balances, pH meters, micropipettes
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2mo
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Data Engineering Intern, AI & Analytics - Fall 2026
Palo Alto or Irvine
$45-$51/hr OnsiteInternship, Full Time
Rivian and Volkswagen Group Technologies
Rivian and Volkswagen Group Technologies: A joint venture developing software-defined vehicle technology and AI-driven connectivity solutions.
Currently pursuing an MS or PhD in CS/ML/EE or related field; strong Python skills, experience with PyTorch or TensorFlow, solid ML/deep learning and reinforcement learning fundamentals, and familiarity with multimodal/foundation models.
Python, PyTorch, TensorFlow, Cursor
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1mo
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Assistant Director, Clinical Research Business Operations
Orange, California, United States
$108k-$205k/yr OnsiteFull Time
University of California, Irvine
University of California, Irvine: Public research university offering higher education and academic degrees.
7+ YOEAdvanced finance and analytical skills with 7-9 years in accounting/financial management for clinical trials; experience with contracts and grants, budget development, and internal controls; advanced communication and leadership skills; advanced degree or equivalent.
Kuali Financial System, Kuali Research, OnCore, EVAL
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2mo
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Chemistry Co-Op Student Intern – Chemistry Compliance Team #705072323
Pomona, California, United States
$20/hr OnsiteInternship
Cal Poly Pomona Foundation
Cal Poly Pomona Foundation: Auxiliary organization providing support services for Cal Poly Pomona.
Currently enrolled in a 4-year Chemistry/Environmental Sciences or related science program; min GPA 2.5; sophomore or junior with ~2 years to graduation.
LIMS, Windows, Laboratory equipment, Chemistry techniques
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1w
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Market Intelligence & Sales Operations Intern (PAID INTERNSHIP)
Irvine, California, United States
$18-$22/hr OnsitePart Time, Internship
Boldyn Networks
Boldyn Networks: Provides shared communications infrastructure for transit, venues, and cities.
Currently enrolled in a degree program, third-year undergraduate or above, with a minimum 3.0 GPA; requires MS Suite knowledge, data visualization, and intermediate research skills.
CoStar, Salesforce, Microsoft PowerPoint, Microsoft Excel, Microsoft LinkedIn Learning
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2w
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Summer 2027 Legal Internship Program
San Clemente, California, United States
$8k/yr RemoteInternship
Surfrider Foundation
Surfrider Foundation: Protects and preserves oceans, waves, and beaches through activism.
Current U.S. law student (completed 2L before internship), strong legal research and writing, ability to work remotely, interest in environmental/coastal and nonprofit law.
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1w
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R&D Internship (Medical Device Company)
Irvine, California, United States
$20/hr OnsiteMultiple Commitments Available
Bright Uro
Bright Uro: Develops wireless catheter-free diagnostic systems for urology patients
Pursuing an engineering or CS degree (senior or grad), experience coding in Python, MS Office skills, strong communication, teamwork, and interest in hands-on product development.
Python, Microsoft Word, Microsoft Excel, SolidWorks
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1w
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Praktikum MSAT Process Science Technology (m/w/d)
Penzberg or Basel or Oceanside or Vacaville or South San Francisco
€2k/mo OnsiteFull Time, Internship
Roche
RocheSIX Swiss Exchange: ROG: Develops and manufactures pharmaceutical medicines and diagnostic solutions.
Enrolled advanced bachelor's or master's student in bioengineering, process engineering, biotechnology, chemical engineering, or related studies; knowledge of bioreactors, fluid dynamics, and mathematical data modeling; German and/or English proficiency.
Python, R, JMP, Viskosimeter, Tensiometer, Clark probe
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3mo
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Executive Medical Director, Immunology Clinical Development - Respiratory/Pulmonary
Irvine, California, United States
$234k-$444k/yr HybridFull Time
AbbVie
AbbVieNYSE: ABBV: Develops and sells innovative pharmaceutical and biopharmaceutical medicines.
5+ YOE2+ MgmtMD/DO or international equivalent; 5–7 years clinical trial leadership; strong cross-functional leadership; English fluency.
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