Hello and welcome to another video, this time we will be exploring the training and selection process for the United States Marine Corps, the specialists in The minimum score an applicant trying to be an enlisted Marine must achieve on the ASVAB is a 31.) The only age requirement is that a person must be at least 20 and less than 30 years of age at What Are the Qualifications to Join the Marine Corps? The following are the basic requirements for joining. You must: To enlist, you must be a U.S. citizen or a resident alien. Meet Marine enlistment includes several requirements. You must: Be at least 17 years old. The age limit for Marines is 28 for enlisted service members, unless a waiver is obtained. Have a high Joining the Marines involves testing your physical strength, endurance, mental resilience and military fitness. Learn more about how to enlist in the Marines. iSkw.