There are many places to search for jobs and internships online. Here are some places to start.
April 2020 Update
Here is a great list compiled by Candor on companies that are still hiring, or have hiring freezes and layoffs:
Job search sites
Biospace.com (Life sciences jobs):
Cal Apprenticeships:
Cal Jobs:
CareerBuilder.com:
DICE.com (Tech and IT jobs):
Eco Jobs:
Employer Search Tool:
Glassdoor:
Government Jobs:
Higher Education Jobs:
Idealist.org (opportunities at nonprofit organizations):
Indeed.com:
K-12 Education Jobs:
LinkedIn Jobs:
Local Jobs:
Monster.com:
Resume Builder:
Simplyhired.com:
TransitionsAbroad.com:
USAJobs.gov (federal government jobs):
Internship and Volunteer Listings
Internships.com:
Intern Abroad:
WayUp internship listings:
UC Berkeley careers site:
VolunteerMatch.org:
Networking sites
Elevator Pitch:
Guide to following up with employers:
LinkedIn Alumni Tool:
Tips for reaching out to someone you admire on LinkedIn: