Internships in Buena Park, California, United States

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.

Fellowship of Christian Athletes (FCA) interns develop student athletes’ calling to ministry while engaging in a 10‑week immersive discipleship program. The role involves spiritual leadership, prayer, Bible study, and coaching support for athletes and volunteers in Southern California.

An internship and co‑op opportunity at Marathon Petroleum Corp. (MPC) offers high‑performing college students in Civil, Electrical, or Mechanical Engineering hands‑on experience in the Logistics & Storage organization.

An internship/co‑op opportunity with Marathon Petroleum’s Logistics & Storage organization offers hands‑on experience in engineering design, project management, cost estimating, scheduling, bid evaluation, construction supervision, safety leadership, and operations coordination. Interns rotate across L&S components—Support Services, Terminals, MPL, and Marine—to gain exposure to pipeline, terminal, and marine operations.

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.

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.

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.

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.

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.

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.

Kemper’s Law Clerk Intern Program equips second or third year law students with hands‑on experience in civil litigation, drafting pleadings, discovery responses, and preparing for mediation, arbitration, and trial. Interns collaborate with attorneys and paralegals, conduct legal research, and manage client communications while gaining exposure to insurance litigation.

Kemper Law Clerk Intern Program provides law students hands‑on experience in civil litigation, supporting attorneys with drafting, discovery, and trial preparation. Interns conduct legal research, draft pleadings and discovery responses, and assist in mediations and arbitrations while collaborating with senior lawyers and mentors.

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.

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.

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.

FirstSteps for Kids seeks motivated interns to support ABA therapy and admin tasks at its Los Alamitos clinic. Interns assist clinical teams, engage children and families, collect therapy data, manage scheduling and records, facilitate check‑in/out, collaborate across teams, and gain skills in development, assessment, practice management, and admin.

Product Analyst Intern at Maersk Logistics & Services USA Inc. supports data‑driven decision making by building holistic data views and delivering insights through dashboards and reports. Works closely with leadership and stakeholders across the Maersk Contract Logistics product in North America to understand business processes and develop analytics solutions.

STRUCTURAL, a leading concrete repair contractor, offers a Construction Project Engineer Internship for Summer 2025 in Garden Grove, CA. The role involves project management support, estimating, budgeting, cost management, scheduling, production tracking, client relations, safety, quality control, and business development. Candidates should have a Bachelor's degree or be pursuing one in Construction Management, Civil Engineering, or related field, strong communication, documentation, organizatio

Harbinger Motors Marketing Team drives brand growth and market expansion for the next‑generation medium‑duty electric vehicles. The Marketing Intern supports event planning, content creation, campaign operations, and cross‑functional collaboration to boost lead generation and dealer enablement.