Can a soldier Commission or Warrant into another branch (Army to Marines, etc)?

I tried this. You may notice that I am still in an Army uniform. I was attempting to try the Marines at one time but then worked with the AF to try go into their Special Operations as an Officer. Both the AF and the Marines are very small and have a very small amount of officers compared to the Army. The Army has a lot of random jobs that only officers fill outside of units. This isn't the case a lot of times with the other branches. When I was looking at the AF I was told that I would have to compete for the next OTS, officer training school, in a year. The Marines pretty said that I was too old. I was 32 at the time I believe. From a quick search you can't be older than 30 to commission in the Marines. I would guess to say you are older than that.

You need to speak to a Officer Recruiter because you are most likely going to run into age limitations in regards to commissioning. Warrant Officer will be an issue as the application process is an internal screening process for eligible candidates from the enlisted ranks. The Marine Warrant Officer pipeline is much different than the Army. Getting a Marine Commission is technically possible but it all depends on the details and most importantly your age. https://www.marines.com/become-a-marine/process-to-join/become-an-officer.html