Internships in La Mesa, California, United States

APA Intern at Alvarado Parkway Institute provides psychotherapeutic care to adults with addiction and psychiatric disorders. Working on the Main Campus in La Mesa, the intern delivers individual, family, and group therapy, psychoeducation, and crisis interventions under supervision of licensed clinicians.

Pre-Doctoral Trainee at Alvarado Parkway Institute supports inpatient and outpatient patients through psychological assessment, testing, and individualized care plans. The role involves administering standardized tests, writing comprehensive reports, and conducting risk and addiction evaluations.

Alvarado Parkway Institute seeks a Counseling Trainee to deliver direct therapeutic services to patients in its La Mesa psychiatric facility. The role involves group and individual therapy, risk assessments, addictive disorder evaluations, and behavior plan creation.

The Social Worker Intern at Alvarado Parkway Institute supports patients in a 66-bed psychiatric hospital by conducting psychosocial assessments, leading group sessions, and facilitating discharge planning. Working 20 hours per week, interns collaborate with interdisciplinary teams, complete discharge paperwork, and maintain communication with families and collateral contacts.

Strategic Planning & Community Benefit team at Sharp HealthCare builds community health impact plans. The intern conducts CHNA research, data analysis, and supports reporting and internal communication.

Future Builders Internship Program - Homebuilding - Land

Lab Assistant (Intern), Product Development at Catalent is a part‑time, 15‑20 hour per week, on‑site internship focused on early‑stage small molecule and peptide drug development. Interns will support formulation development (tableting, solutions, suspensions, encapsulation, spray drying) and analytical chemistry techniques (pH, density, powder X‑ray diffraction, thermal analysis, microscopy, dissolution testing).

Lab Assistant (Intern), Product Development at Catalent’s San Diego facility. This part‑time (15‑20 hours per week) on‑site role supports early‑stage development of small molecule and peptide drug candidates.

Project Scheduler Intern at SOLV Energy will develop and maintain integrated EPC schedules for battery storage, PV, high voltage, and SCADA projects. Responsibilities include using P6 to create and update schedules, interpreting BESS site layouts and single-line diagrams, analyzing project documents, creating RFIs, ensuring realistic durations with CPM best practices, summarizing assumptions in Word, attending project meetings, monitoring critical path deviations, supporting business development

Instrumentation Engineer Co-op at Vertex offers a 6‑month paid program for advanced undergrad or grad students in Electrical, Mechanical, or Physics. Students design, prototype, and build a low‑profile electric motor instrument, develop embedded or PC‑based control systems, and collaborate with scientists and mechanical teams.

Vertex seeks a Ph.D. student for a 6‑month co‑op in Data and Computational Sciences. The role involves physics‑based simulation and AI for small‑molecule lead optimization, working with computational chemists and medicinal chemistry partners.

Internship with Wounded Warrior Project’s Project Odyssey program. Gain experience in experiential education, adaptive recreation, program logistics, and participant engagement.

LPL Financial invites candidates for a 10‑week paid summer internship as a Product Intern. The role focuses on researching, designing, and prototyping new product/service offerings, collaborating cross‑functionally to identify opportunities, develop business cases, and present to senior leadership.

What if you could build a career where ambition meets innovation? At LPL Financial, we empower professionals to shape their success while helping clients pursue their financial goals with confidence.

Business Analyst Intern will assist in implementing technology solutions to help businesses operate more efficiently and cost-effectively. Responsible for gathering and communicating project requirements, supporting business processes, and maintaining corporate databases and financial applications.

SOLV Energy seeks an Environmental Compliance Intern to support its National Compliance Program during the summer of 2026. The role involves managing documentation such as audits, inspection reports, and stormwater plans, maintaining a Smartsheet database, and coordinating with field teams to ensure regulatory adherence.

Dexcom Corporation, a global leader in continuous glucose monitoring, invites students to join its 12‑week U.S. internship program in San Diego. The program focuses on software test development, offering hands‑on experience building automation tools and frameworks that validate Dexcom’s FDA‑compliant software.

Labcorp seeks an Oncology Research & Development Intern for an 11‑week paid onsite internship in San Diego. The role offers hands‑on exposure to clinical testing, Next Generation Sequencing, data analysis, and assay development.

Internship offers paid 12‑week, 40‑hour per week experience in San Diego newsroom. Gain hands‑on journalism, story pitching, research, writing, editing, photo/video production, SEO, social media, data analysis, and mentorship from veteran editors.

QuidelOrtho seeks a Logistics and Distribution Intern to support the mission of "Changing Lives, One Test at a Time." The internship is a full‑time, 10‑week paid program (June 15–August 17 or July 6–September 7) at the San Diego, CA facility. Interns will gain hands‑on experience in logistics, inventory control, material handling, and process improvement while contributing to productivity and accuracy.