From professional organizations to internet newsletters, more profiles of careers and specific companies exist that you can ever cover. Such websites as Quintessential Careers (quintcareers.com) and Careers.com provide basic background, listing geographic opportunities, average salaries, required skills, etc. Houses of faith, libraries, social media, chat groups, and large social clubs (e.g. your outing club) may be mined for members of your chosen profession or firm. Conserve your precious time. Deal with receptive organization officers who know their members.
Remember, people are your ideal resource. Other sources abound.