Is it authorized to rate somebody the same rank as you for an OER?

Usually if you are in a position which the individual falls under you it is okay. As far as for the what is directed by the Commander you might check the AR reference on the OER 67-8 form. I believe it is AR 623-105.

CPT Hignight, the BLUF: If you outrank him and he works for you, then it is appropriate for you to rate him (for example, time in grade). If this is not true, then generally you should NOT rate him. It is not uncommon that the usual relationship is not normal, and all Soldiers should be taken care of (as far as rating), but you are not doing yourself or the Soldier any good if he/she is not working for you. Placing Soldiers in your chain because of the preference of your Bn CDR is undue influence and is concerning, let alone inappropriate. If you have any concerns about this and cannot resolve this with your CDR, you should seek legal guidance. Every Soldier has a right to a fair rating by the person for whom they work. Not knowing the specifics, this is the best I can respond. v/r TEB

Seek legal counsel; and counselings are important; I personally do not want another CPT to rate me; we are basically peers; someone may not want to do the right thing

Refer to AR 623-3. You are authorized to rate the other CPT provided you have date of rank. Ideally you would have direct oversight of this Soldier to evaluate their performance. In some circumstances the Commander may have limited staff to serve as Raters and Senior Raters, and may have to adjust the rating scheme accordingly.

Yes in certain cicumstances. AR 623-3

The regulation is 623-3. You are authorized to rate a soldier so long as you are senior to them by Rank OR Date of Rank :)

Yep. As a MAJ I was rated by another MAJ. That was also my first ACOM. He was the section chief though so it was more black and white than your situation.

Are we sure that an officer can rate an officer of the same rank. I feel like the answer got off topic.

Can a LTC, let's say DCO, rate another LTC, say the S2 or S3 -- if the S2 / S3 has date of rank over the DCO.

I don't care about the moving people around and managing profiles and politics. Is it within regs or not?

It is authorized to rate someone of the same rank as long as your date of rank is prior to theirs. If you are not in the individual's direct chain of command, the question really should be why isn't the officer's rater taking the time to do the right thing for this individual? You should be able to find information on authorized raters and senior raters in the latest evaluation manual. If you have questions you may want to contact your Branch Manager for the manual number as well as advice on how this will impact the rated officer's future board reviews.

Your question raises a couple of issues. What is the reason for the commander wanting you to rate the other officer? Is it to give the officer a more fair evaluation? Do you have better visibility over what the officer is doing? Can you fairly rate him based on your interactions?

Just to reiterate what others have said, AR 623-3, para. 2-5a and b, you must be the direct supervisor of the Soldier and senior in grade or time in grade to that Soldier. There are stipulations for people in command positions that can change that. Based on what you said, you are not the direct supervisor so an OER from you could violate the chain of command. That being said, I think the USAR will be more lenient on rules because of the part time duties, etc. I had a situation where a LTC of a lesser date of rank wrote an OER for me and he was not in a command position. I raised the issue with the Commander and ended up getting rated by the LTC regardless. I was going to fight this but in the end, it was not worth doing that.

There are a couple of things I think you should consider. Per AR 623-3, it does not seem like you are eligible, However, if you push back about rating an officer not in your direct supervision, what will the impact be on you with the commander? Second, can you fairly rate him? So I would say that unless you have a strong objection to doing it, I recommend you rate the officer as it seems like it will be easier for everyone.