Internships in Placentia, California, United States

Seneca Family of Agencies offers immersive fieldwork placements for MSW, MFT, and PCC interns across Southern California. The program follows a standard academic calendar, beginning in the fall and concluding in spring/summer, with a minimum commitment of 16 hours weekly—some sites require 20‑24 hours.

Rosendin Electric, a leading electrical contractor, offers a Summer Internship Program for Civil Engineering students. The 10‑to‑12 week paid internship provides hands‑on experience in Construction Project Management, Engineering, Procurement, Estimating, Safety, and Corporate roles.

Uline is seeking a motivated college student for a paid Outside Sales Internship during Summer 2026. The role offers hands‑on experience in face‑to‑face selling, weekly sales training, and mentorship from seasoned sales professionals.

RTX invites students to join its Connected Aviation group as a Software Engineer Intern for the summer of 2026. Based in Fullerton, California, the role is on‑site and offers hands‑on experience in developing the Wide‑Area Augmentation System (WAAS) for the FAA. Interns will design, code, test, and document new or modified software, collaborating with developers, testers, release engineers, and cross‑disciplinary teams such as systems and hardware.

Volunteer/Internship – Law Student Externship at the Superior Court of Orange County offers law students an unpaid, hands‑on experience in legal research and memorandum drafting. Externs work behind the scenes, supporting judges and clerks with civil, criminal, family, and juvenile matters.

The Veterinary Emergency Group (VEG) offers an unpaid externship for veterinary technology students to gain hands‑on experience in emergency medicine. Participants shadow credentialed technicians, assist with triage, diagnostics, anesthesia, and inpatient care, and receive mentorship.

This internship offers hands‑on experience in industrial engineering at UPS. The role involves field observations, data analysis, and report creation to support process‑improvement projects. Interns will research data, develop queries, and prepare presentations that help reduce costs and enhance operational efficiency.

Industrial Engineering Intern at UPS will conduct operational observations, analyze data, develop reports, and support process improvement projects to reduce costs. Responsibilities include identifying business impacts, recommending and implementing process improvements with analysts and sponsors, and preparing presentations and reports.

Northwestern Mutual College Financial Representatives internship program builds future financial planners through hands‑on mentorship and proprietary planning tools. Interns prospect and network to grow client bases, develop business strategies, and prepare financial plans while engaging weekly coaching and training sessions.

Event Operations Intern at OC Sports & Entertainment, LLC. The role supports the Honda Center’s live entertainment team, coordinating event orders, interdepartmental communication, and day‑of‑show logistics to deliver safe, memorable experiences. Interns work on‑site in Anaheim, assisting with planning, promotion support, and operational documentation while gaining exposure to venue management systems and budgeting.

RTX is seeking a Systems Engineering Intern to join the Multidisciplinary Integrated Systems Department in Fullerton, CA. The role focuses on modeling and simulation for space-based systems and satellites, contributing engineering practices to solve complex computational problems. Interns will identify and update circuit card and subassembly designs, and may travel to suppliers.

First American offers a 10-12 week paid internship in Information Security Risk Management. Intern works with Information Security Risk Manager to support risk management program, gaining experience in governance, risk frameworks, security training, and analysis.

First American’s Data & Analytics division offers a 10‑12 week paid internship for graduate students in AI/Data Science. Interns work with data scientists, engineers, and subject matter experts to build property valuation and collateral analytic models using nationwide property data.

Internship in Information Security Governance & Risk at First American. Supports risk management, RCSA, gap assessments.

First American seeks a Graduate Intern in Public Affairs & Communications to support internal storytelling, content creation, and engagement initiatives across the organization. The role involves leading a monthly digital engagement kit, producing an intern spotlight series, and assisting with internal communications materials.

Data Science Intern at First American offers a 10-12 week paid internship (June–August 2026) that can be worked from office or remotely. Interns work in the Data & Analytics division, collaborating with data scientists, engineers, and subject matter experts to build property valuation and collateral analytic models.

We are seeking motivated students for a 10‑11 week R&D Engineering Internship at Medtronic. Interns will work full‑time (40 hrs/week) across 15 U.S. locations, including Minneapolis, Tempe, Santa Rosa, Lafayette, Boulder, Irvine, North Haven, Memphis, Newton, Santa Ana, Dexter, Fort Worth, Santa Clara, Jacksonville, and Boston.

Environmental Planning Intern - Summer 2026 at HNTB. The role supports the Environmental Planning group in Santa Ana, CA (Irvine).

Medtronic is seeking engineering interns for Summer 2026, specifically candidates attending the 2025 SHPE National Convention in Philadelphia. Interns will work full‑time (40 hours per week) from June to August, with a minimum of four onsite days per week.

Power Electronics Team at Harbinger Motors, developing electric vehicle power systems. The intern assists with design, testing, and validation of inverters, chargers, and converters, creates PCB layouts, runs simulations, and documents results.