Internships in Castro Valley, California, United States

Externship Opportunities at VetnCare offer veterinary students a 2‑week, hands‑on experience in a supportive clinical environment. Interns shadow veterinarians, observe diagnostics, treatment planning, and case management, and gain exposure to surgery, dentistry, urgent care, and exotic animal medicine.

Uline Sales Team offers a fast-paced, high-energy environment where interns gain hands‑on experience selling to diverse customers. As an Outside Sales Intern you’ll conduct customer visits, deliver service, and participate in weekly sales meetings while learning from seasoned Account Managers.

Hardware team at Skydio develops next‑gen autonomous flight technology. The Operations Program Management Intern supports hardware development programs, coordinating schedules, milestones, and cross‑functional activities while creating dashboards and tracking risks.

Flatiron's Intern Program offers college students in Civil Engineering, Mechanical Engineering, and Construction Management challenging, real-world work opportunities. As a Field Engineer Intern, you will apply academic training on project job sites, assisting project managers and on-site construction staff with plan interpretation, project specifications, cost codes, and construction schedules.

Fuse is pioneering fusion energy, building Titan, a next‑generation fusion generator. As an intern, you’ll work on the R&D team in San Leandro, contributing to design, testing, and integration of cutting‑edge components.

Fuse is pioneering fusion energy, aiming to deliver limitless, clean power by replicating the sun’s process. As an intern, you’ll join the Titan project, helping build the next‑generation fusion generator.

Indie Campers seeks a Tourism & Operations Intern to join our San Francisco Depot. The role offers hands‑on experience in RV and campervan rentals, covering front‑office customer service, sales, and back‑office operations such as reservation alignment, vehicle preparation, quality control, and fleet coordination.

This unpaid externship offers veterinary technology students a hands‑on, immersive experience in emergency medicine at VEG. Participants shadow credentialed technicians, assist with triage, diagnostics, anesthesia, and inpatient care, and practice skills required by their academic programs. The program emphasizes mentorship, flexibility in externship length, and future hiring opportunities for former externs.

Kairos Power's Engineering teams in Salt Chemistry, Fuels, and Materials are advancing nuclear energy solutions. Interns will collaborate on chemical, materials, and process engineering projects, conducting experiments, data analysis, and documentation while gaining hands‑on experience in labs and manufacturing settings.

People Team at Astra offers an internship program for incoming sophomores, juniors, and seniors across engineering and business disciplines. Interns contribute to spacecraft and launch vehicle design, systems engineering, CAD modeling, analysis, testing, and documentation while working alongside senior engineers.

Core Technology team at Rondo Energy develops high‑temperature heat battery platforms for industrial decarbonization. The intern supports thermal and fluid performance analyses using 1D simulation tools, builds steady‑state and transient thermal models, and validates results against test data.