How to find USCE opportunities:
Since there is no formal application process to find such experiences, you must search online for likely spots at larger hospitals, medical school affiliated hospitals, etc., and find the contact information. Prepare a cover letter briefly explaining what you are seeking, when you would like to do it, and for how long you want it. List your medical credentials and attach a CV with your contact information. Your cover letter need not be that elaborate, but write a specific letter for each location. Email or send to as many sites as you can, and then follow up in a week or two by phone or email to ask if they can offer such an experience.