I preface this with: If you are not military, I cannot speak to them letting you delay your class. In my interview group we were all military, and we all got CJO's. There were a few guys that had 2-3+ months left of active duty service and they hired them knowing they were going to have later class start dates. You are required to bring a letter from your commander stating that you are eligible for hire even if you are guard or reserve.