I'm planning to seek a commission; what should I know about the process? What advice do you have for me?

just out of curiosity are you looking into getting a graduate degree?
Getting a grad degree also opens up a lot of different doors within the Army.

Since you already have a degree you are eligible for OCS. Begin gathering letters of recommendations and endorsements now. You will face a local Board, much like an E-6 promotional Board where officers will ask a lot of questions. Based on your accomplishments listed in your email, you should have no problem getting accepted into the OCS. It is worth it. I was enlisted for seven years before going the ROTC route. I retired as a Major.
SaM

Apply! When selected and you attend Officer Training, there are lots of newbies that don't know crap going through officer training and holding cadet officer ranks. Simply do your best, keep your mouth shut about the perceived stupidity, don't worry about being a cadet leader, means nothing after you graduate from Officer Training. Associate and if possible room with other former enlisted cadets. Watch each others back, exceed in measured performance, and when fed up with crap remember that at the end of Officer Training, you out rank the newbies and if you have enough years you get more pay and things return to the real world and the real mission.

As an aside, when I attended Officer Training (OTS) USAF, I was an E-5 with over 5 yrs service. I quickly scouted out two other former enlisted, an E-6 and E-7, and we chatted and agreed to room together. It was great 1) because keeping the room up to standards was breeze and 2) we could rely on each other. On our first room inspection, the Captain (a grounded pilot) looked into our closets and saw we had rows of decorations. The E6 was a helicopter gunner in Vietnam and had three bronze stars, the silver star, the purple heart, and numerous commendation medals. The Capt said he hope we really earned these medals. We firmly said we did! (ignoring the "sir" this time). He sheepishly retreated. From then on, while the newbies played cadet chain of command , we focused on PT and course work or were otherwise busy. We had liberty every weekend. (Loved seeing my wife). Also, highly recommend being proficient in firearms. I was already an expert in the M-16. In OTS, when I walked on to the small arms range, I immediately qualified as an expert in small arms.. The Range Chief smiled and the word spread and I found more time free to focus on my professional course work.

Again apply - you are ready!

Learn all you can about the process so you can optimize your chances and ensure your packages is as competitive as possible. Have several people review before you submit. Work with the education office as they are the experts on what makes a package competitive. Then, don't let anyone discourage from going forward as it was the best thing I ever did career wise.

I entered as a PFC got out as an E-6, went through ROTC retired as an O-5 (too banged up to deploy anymore according to med guys). You're a smart guy, my recommendation is to apply to grad school, do ROTC and get commissioned. Frankly that's probably easier to get a slot than OCS. However if you haven't applied to OCS do it, not certain what current retention requirements are but... Whichever way you go, not a lot of smart fit experienced folks out there seeking a commission with a degree already. You are already that, I'd find your nearest Professor of Military Science (college ROTC CDR) and apply to grad school - I suspect they'd be happy to have you. I assure if I can do it, you can do it. Check out http://www.goarmy.com/rotc.html and go for it!

Applying to OCS is much simpler while you're still on active duty vs ETSing and applying as a civilian. You've got the education, APFT & GT requirements met already.
Go to this site (if you haven't already) to check out what you need to do to get this rolling. https://www.hrc.army.mil/officer/officer%20candidate%20school

Good luck - let us know how it goes for you.

You have some great advice given. The Green to Gold program will be a good idea if you are motivated to earn a graduate degree, and the Army (or other service) will pay for it. Always think two steps ahead in your career. Right now many branches are experiencing growth and development, while others seem to be withering on the vine. If you are a self-starter, disciplined, and want to go where few have gone before, which seems to match your background, try to go for Computer Science and become part of the CyberSecurity force. You will probably get into a joint service assignment, get great exposure to cutting edge military doctrine in the making, and you will also see the best of the best from all our great services. Going back to two steps ahead, and you will assure yourself an interesting future, if that is what you end up deciding to do.

You can either go the OCS route or Green to Gold to get your Masters. If your post is accurate, you're a good candidate fur either. Green to Gold will take longer, but you'll have a much different experience than OCS. The application windows are different did these also, with OCS having more opportunities to apply. Personally, I did GtG and found that I learned more about officership than some of my friends that attended OCS.
There are four paths to officership: http://m.goarmy.com/careers-and-jobs/become-an-officer/how-to-become-an-officer-in-the-army.m.html
Good luck!

You are welcome. Please contact me for any ear you need to listen and bounce ideas and ponderings.
Respectfully,

Frederick

Good job! When I was in basic, platoon guide, I had a fellow soldier I remember so well. He had a masters. When I learned this I was stunned. I asked "Why are you not an officer? His reply, "I will be an officer, I wanted to come and an experience what those I will lead experience." Wow. There are a lot of good men and women who have done just what you have done. Go for it. Remember, find those commanders who will believe in you. Your military bearing, ethics, drive and humble spirit. If you do not find support, you can do a direct commissioning packet.
As you seek, remember you may have people place obstacles in the way. Go directly to the regulations and make sure you read entirely -study, master them. Be respectful and complete the processes. People will observe your relentless drive. This is a high mark for them as they observe your non quitting positive attitude as you move through the process.
If necessary, go under open door policy to the Commanding General and seek support. Believe in you. Drive on!