im looking for there security freq
I've never listened to Amgen, so unless someone knows the answer, your best bet is to program in all the frequencies at those links and listen in, and figure out which, if any, are used by their security folks.
Keep in mind that those are all "business band" frequencies, and are shared with other companies, so it may take a good deal of careful listening and note-taking to determine who you're hearing. Good luck, and let us know what you find.