Where can I find the regulatory guidance for the proper way for a commissioned officer to address an NCO?

CW2 (Join to see), this really doesn't seem that difficult and why this officer is struggling is beyond me. The Army makes it really easy for everyone to address everyone else. You'll find everyone's "first" and last names right on their uniforms. The first name is rank and the last name is on the nametape! Easy! For example, were I to address you, I would simply say, "Good morning, Sergeant Wise." How hard is that?

CW2 (Join to see) AR 600-20 tells you how to say each rank in the Army, TR350-6 shows new Soldiers how to address and how to be addressed, AR 600-25 covers salutes and visits. There used to be an FM that as called the Soldier's Guide that also covered customs and courtesies.

When I was in the Marine Corps, to get the tension off of new people arriving in our squadron I would tell them that we had a relaxed shop and called everyone by their first name, and my first name was SGT.

Staff Sargent, I'm sure you have heard "Respect is not demanded or granted, it is earned". An officer must earn the respect of those he or she works with by demonstrating respect to everyone. That is not done by calling them by their name with out stating their rank first. I only spent 20 years in the army and worked with the Navy for almost 30 years and never heard an officer address an enlisted by his or her first name.

Just tell him/her your first name is SSG.
Then remind him/her to be professional. You have soldiers under you.

I have been off active duty for over 41 years. Last Reserve drill was 30 years ago. Here is my take.

The proper address for an NCO is Sgt (or completer rank e.g. SSG) and last name. Anything other than that can be acceptable if the NCO does not object. But, it should be rare that the first name is standard. Using the first name could show a lack of respect for the NCO who has earned the strips worn.

In my experience, officers in the Army address other officers of equal or lesser rank by their first names. They are expected to address those of greater rank appropriately regardless of how they are addressed. My guess is that this is a 1LT/2LT you're referring to and he or she does not realize their mistake. It could also be someone who just doesn't care. I would push the issue through the NCO support channel. As a battalion CSM, I would have been interested to know this was occurring in my unit and I am sure the Bn Cdrs I worked for would have supported me in making the correction.

While I might have "slipped" once or twice in a private setting (just the other person and myself), I always made it a practice to address NCO's/Petty Officers properly according to their title. It is disrespectful to use first names in normal settings. Each of our subordinates should receive proper respect, as do each of our seniors. To do otherwise would be contrary to the morale of others and traditions of the services.

I can't locate anything specific, either. I would recommend letting the Officer know that addressing you by your first name (especially in front of your troops) feels and makes the appearance of being unprofessional.

all of the officers I work for call me Dan. I am totally fine with it even though I refer to them as sir. This is a close community and I work very hard to be here. We are family and this is why we are so effective. These kind of questions makes me proud to have left the conventional Army.

In the Navy its either Petty Officer or Chief. Ive had officer who addressed me by my first name in private, because of knowing them, because either having served with before, or them being prior enlisted.. But this is something that should never been done in public. There is a line between officer and enlisted and I believe calling an NCO by his first name in public, crosses that line and is a bad example for junior troops

This is a first for me. To this day I can't get officers I worked with to call me by my first name. They all still call me Chief. While still in the Air Force I had some officers try to call me by my first name. I usually requested they address me by my proper title. That usually solved it. A few called me Scotty, when in private, but they were usually Commanders who I respected greatly & it did not bother me. Never in front of the Airmen. Sounds like an officer who doesn't realize the effort & sacrifice it takes to earn rank.

Speak to your senior command NCO "off the record" with the details. A command NCO will talk to the CO and a good CO will remind the junior officers how to address subordinates in a professional manner.

In every service, there are documents and regulations that keep mutual respect in mind, as well as phrases and words that might easily pass as fraternization; I got into leadership positions early in my Naval career, but I never allowed my juniors to call me by my first name. It was sometimes uncomfortable as I rose up in the chain of command, as my senior enlisted tended to call me by my first name in private, never in public, because I was more their age and life experience. When I was the most senior enlisted on the command, I would allow the CO and XO to call be by my first name in private, and I would never reciprocate, unless they insisted, as long as it would pass scrutiny as not being construed as favoritism. I would advise a commander to eschew calling anyone by their first name in public, and would remind them of the rules on fraternization, as they were developed to promote command cohesiveness.

Who cares? This really sounds petty. You should feel lucky that the officer took the time to learn and remember your first name, Id consider it a compliment and only makes him seem more personalable. I find this far better than an officer thats disconnected

Politely and consistently ignore him. When he calls you on it, apologize and tell him of your confusion since you have gotten used to being respected enough by others to be addressed by your sir name especially since you don't know if there are any others with your first name which you only respond to when the women in your life use it. This worked for me

This is like an NCO refusing to call an Officer "Sir" and instead using his rank, or the abbreviation like L T. It goes both ways.
Now if a senior officer who has known the Sergeant a long time calls the NCO by his first name it is not a professional thing to do in a public setting. For a Junior Officer to do so publicly are really not that smart when the NCO objects.

I had a Lt that called me by my first name when i was his Plt Sgt but never in front of other soldiers if you dont like it tell them if they dont change then take it up the chain of command

I would mention it to another officer that you find it unprofessional. He may take it a lot better from a peer.

I serve for 39 years, during all this time there was only 3 way's to address and NCO "Sergeant" "1SG" and "SGM"