The Marine Corps does have a commissioning program in the reserves. You split up the training over the summers and go through both sides of the house (enlisted and officer). I'm not sure how it works on the O side if you pursue/accept a commission at the completion of college, but these are questions you could take to a recruiter if it's something you're interested in looking further into.
Ask a recruiter but think about this: if you are going to put in the effort for a 4-year degree, then aim to become an officer.
I disagree with this line of thinking. Just because someone has a degree that doesn't mean they have the leadership ability to become an officer. That doesn't mean they would be best utilized as an officer or enjoy it as much as being enlisted. Just like running one's own business isn't for everyone, same applies here. Not everyone thrives on being given a lot of responsibility and the life that is an officer. There were several valid reasons why I decided to pursue OCS, I actually enjoy having responsibilities and believed my character and leadership abilities would benefit the Corps. However, there were a couple that don't seem as valid that I think other college grads might be considering and that is this: I was 24 years old and wanted to make some decent money and have my own living quarters. I had already shared a room in a fraternity house and dorms and didn't want to continue doing so. Just explore both options thoroughly, examine what YOU truly want out of the military experience, and do some real soul searching. Good luck.
Not sure if you are talking about PLC? If so, you don't have to be in the Reserves for that program. Any college student can apply and complete OCS during the summer. I knew a few guys that were Reservists that were also in PLC so I don't know if that's what you are thinking of?
The PLC Program has both ground and aviation options and is open to college freshmen, sophomores and juniors. Freshman and sophomores take their pre-commissioning training at Quantico, Virginia in two separate six-week training sessions over two summers without interrupting their academic career. One session takes place at the end of the first year following acceptance into the program and the other session is conducted at the end of the junior year of college. College juniors accepted into the PLC Program attend 10 weeks of training after the end of their junior year. After completion of all training requirements and upon receipt of degree, candidates are commissioned as a Second Lieutenant. Immediately thereafter, assignment to active duty commences.
The mission of OCS is to provide a physically challenging and mentally stressful training environment in which candidates can be evaluated on their leadership ability and potential to serve as United States Marine Corps Officers. Officer Candidate School may well be the most demanding challenge you ever faced.
Upon completion of Officer Candidate School (OCS) and graduation from a four-year college, you'll be offered a commission as a Marine Officer. If you choose to accept this 'job offer' you will serve on active duty in the Marine Corps for three and a half years (more if you choose). Your commission is the beginning of a career (whether you serve 4 years or 20+ years) with many opportunities for advancement and a broad array of exciting jobs.