In addition to letting you find people based on where they live or where they studied, Facebook allows you to search for people currently working for a specific company or organization. Find people on Facebook by employers by using the search box in the mobile app or by using the Employer filter on your computer.
Search on the Mobile App
Tap the search box at the top of the app.
Type people working at X, where X is the employer's name, and touch Go.
Tap See More to view the full search results list.
Touch the Add Friend icon next to a user's name to send her a friend request. Alternatively, tap her name or photo to view her profile.
Search on the Facebook Website
Click the Find Friends link at the top of any Facebook page.
Enter the employer's name in the Employer field and either press Enter or select one of the search suggestions. Facebook then displays a list of users working for that company or organization.