Medical courier jobs in California typically involve transporting medical specimens, equipment, and supplies between healthcare facilities and laboratories. Here are some potential job openings to consider:

1. LabCorp: This company frequently hires medical couriers to transport specimens to and from their laboratories in California. They require a valid driver's license, a clean driving record, and the ability to lift up to 50 pounds.
2. Quest Diagnostics: Another leading provider of diagnostic testing services, Quest Diagnostics often has job openings for medical couriers in California. They require a high school diploma or equivalent, a valid driver's license, and the ability to lift up to 50 pounds.
3. Bio-Reference Laboratories: This clinical laboratory services provider has several locations throughout California and frequently hires medical couriers. Applicants should have a valid driver's license, a clean driving record, and the ability to lift up to 50 pounds.
4. American Red Cross: As a nonprofit organization dedicated to providing blood and disaster relief services, the American Red Cross often has job openings for medical couriers in California. They require a high school diploma or equivalent, a valid driver's license, and the ability to lift up to 50 pounds.
5. Clinical Reference Laboratory: This clinical laboratory services provider frequently hires medical couriers to transport specimens and supplies between their California locations. They require a high school diploma or equivalent, a valid driver's license, and the ability to lift up to 50 pounds.

These are just a few potential job openings for medical couriers in California. You can also check with local hospitals, clinics, and laboratories to see if they have any openings or know of any job opportunities in the area.