The International Campaign to Abolish Nuclear Weapons (ICAN) has identified universities and colleges in the United States that are supporting the production of nuclear weapons—some even have contracts to manage Department of Energy bomb facilities! ICAN’s report is called Schools of Mass Destruction, and you can find it here.
If a college or university near you—or maybe one you graduated from!—is on the list, you can take action. Contact faculty members or see if there is a progressive student group. Or write to the President of the school. Here is a sample letter; you can adapt it to make it your own, of course. The ICAN report may even have specific information about your school that you can incorporate.
You can also find additional resources here.