U.S. Host Registration Form This Registration form is for U.S.-based Hosts only. If you are applying from another country to join MESA’s U.S. training program, please do NOT register here. Please review the Steps-to-Apply Steward page here. User Registration for Host Applicants (new by RPG) Name * First Last Name * Last Username * Username must be at least 8 characters and not longer than 24. Only lower case letters (a-z) and numbers (0-9) are allowed. Email Address * Enter Email Confirm Email Address * Confirm Email Password * Enter Password Confirm Password * Confirm Password reCAPTCHA Register If you are human, leave this field blank.