Your ER Doctors do not use ACLS, nor should any board certified EM physician. It is a backburner protocol that can be implemented while thinking but is ultimately a protocol created for non resuscitationists. Your ED should not be doing "ACLS too." There is also a significant difference in the number of available hands for CPR, med pushing, and ultrasound machine, a pharmacist, a respiratory therapist, etc etc. I know I don't know all the details, but a young person who arrests in the field should be brought into the ER ASAP.
My particular Emergency department. Things might be different elsewhere