Actually, a simple Google search will often do the trick, as long as you use the correct search terms. Try searching “[company name] press release” and see what comes up. Very often, a PR rep from the company will have a direct email address listed at the bottom of the article. From there, you should be able to figure out the company’s email format and will be able to make an educated guess at the email address of the contact you’re hoping to reach. In some press releases, you may find a more generic address (firstname.lastname@example.org), and in that case, go one step further and google “@companyname.com” (including quotes) to see if any employee email addresses pop up. You can also try googling the person's name in various common email formats until you find one that yields multiple results.
Unfortunately, sometimes these strategies won’t work. If the contact you’re hoping to reach has a hyphenated name, a multi-word name, or the same name as someone else at the company, you may not be able to figure it out. And of course, some people simply won’t respond to a cold email. If that happens, don’t get discouraged -- you’ll just have to find another way in!