Welcome to the new, unofficial Marine Corps Officer Candidate School Guide. When preparing for Marine OCS, it’s tough to find all the information you want and need in one specific place. That’s where we come in. We’ve been to Officer Candidate School before and we know the articles you need to read, the workouts you need to complete and the steps you need to take to be successful. Throughout this site, we’ll have plenty of information, advice and anything you need to get the job done in Quantico!