How would you recommend dealing with a command that continues to downplay your role and MOS/NEC?

You just focus on what you can control, not what you cannot. Do your job the best you can. If your job was not important, the Navy would not have it. That said, many jobs in the Army (most every one) are support jobs, and we spend our lives supporting the main effort, but we are not the main effort. I suspect the Navy, the Marines and Air Force are the same. If you are a support Soldiers/Sailor, you need to focus on what you do, and know (A) they could not succeed without you, and (B) accept that many days no will every know you are there, until you are not. PO2 (Join to see)

Just do your job to the best of your ability and let your success and record speak for itself. Someone will notice.

PO2 (Join to see) In my four years in the Marine Corps, no. During my civilian career, I had several bosses that were this way. I continued to do my job to the best of my ability. One boss could not hack it and left. My last boss was very bad. I never said anything, but my boss was laid off and I took his place. By working hard and staying out of politics, I managed to be the last person standing out of a fourteen person section. My job ended when the Space Shuttle program was completed. During my 33 career, I observed many leadership changes, some good, some bad. You can either leave or stay and put forth your best effort. I have the deepest respect for your MOS of Corpsman. Thank you for serving.