Going beyond LinkedIn, how to unlock the hidden job market

"Nearly 70% of companies hire through employee referrals. These job openings may not be posted online, or employers may choose not to advertise them publicly. Instead, they approach employees and internal networks as trusted sources to help fill positions. As a job seeker, you need to find a way to break into this “hidden” job market. For PhDs it is one of the most effective ways to get hired quickly, make a career transition, or land your first non-academic job.