Will one DUI end my career?

SSG (Join to see) As a 35N, your clearance is an issue for sure, your BDE and likely the Div security managers will review and make recommendations to the CDR's .
Without that clearance, you will be separated.
Come Board/ QMP time, your record will certainly be reviewed..As this happened as a SSG, it will be very difficult to demonstrate you have overcome your transgression and excelled since that day in the very near term when the next Board / QMP board happens.

I would suggest you make this a learning experience as best you can AND start immediately with plans for "What If I get selected for QMP" Don't let it be a surprise you get selected for separation if you make it through the next QMP..the clock is ticking..build a service record that speaks for itself on what you did "after" to support the nation, the unit, the mission and better yourself.

What the ideal situation should have been was to let your chain of command know ASAP. Then take whatever heat comes at that level. At the same time, on the back end since it's a civilian DUI fight it tooth and nail so you'd have a chance to state a case to retract the negative actions the Army will leverage in the event you happen to work out the DUI in the civilian courts.

But, regardless of the civilian outcome not bringing this to the attention of your chain of command gives them ammo against you.

There was a SSG that was suppose to replace me from my deployment, but get got a DUI before he shipped out. His clearance was suspended by the CO. He fought it tooth and nail.

Last time I saw this SSG in person was a few months ago, and he is a 1SG now.

It's not a chapter, it's a new ETS, you'll still get an honorable discharge.

It's not QSP, it's QMP. You'll want to read the QMP MILPER located on the HRC Enlisted Promotions page.

My $.02 as a SIGINTer -- it doesn't look good. My expectation as a leader was to be informed of these issues as opposed to "finding out". While DUI is bad, not being accountable is adding fuel to the fire. I'll hold you to a higher standard because of the clearance. Prepare for the worse, but this recruiting climate may be to your advantage. There is an after service market for those with a clearance and your skillset. Own your transgression and be the consummate professional moving forward. Lastly, if you don't have a degree yet, use the resources that are available to get one while you have access to them -- Good Luck.

Having worked at DA on a special assignment with the combat arms division, I sat on numerous QMP (not asp as you wrote) boards and DUI's were a kiss of death. Regardless of what your commander's say, prepare for the worse. The field grade Article 15 is the gravy and is standard procedure. With the Army going through tough times, you can hope for the best, but I'd be seeking civilian options.

Remember, he is innocent until convicted. Seems like everyone is just saying skip the trial and hang him, now.

You're going to face a QMP. Your chances of surviving a QMP as a SSG with a DUI are slim to none...leaning more towards the none side of the street.

It is possible that they can initiate separation due to considering DUI's a commission of a serious offense, or if this is not your first DUI, or due to security clearance reasons.

If you have already been actually noticed that you will be receiving a GOMOR and have conducted your Article 15 (NJP) first reading, you should immediately seek out Trial Defense Services (TDS) and set up an appointment with their staff to discuss your options.

You will want to submit a statement and matters in defense, extenuation, and mitigation. DO NOT rely on a verbal response, take the the time to gather people to speak on your behalf or write character letters to submit to both the GOMOR and the Article 15. Take the time to write a memorandum explaining your actions and your request for favorable consideration to the general officer issuing the GOMOR and to the commander initiating the Article 15.

If you are noticed for separation, you will also want to contact TDS for that as well and if possible request a separation board if it is your intention to stay and you will also submit matters for that as well.

You might be in the wrong, but you can fight the whole way to stay or receive favorable consideration on punishment or character of discharge.

Additionally you can also appeal punishments in certain areas of the process, TDS can explain that to you. DO NOT rely on TDS to do everything for you, they are a resource and can advise you or give you information but you will have leg work to do. Your response, your supporting documentation, enrolling in any alcohol or driving recovery classes, and your witnesses or speakers on your behalf are your responsibility to take care of.

Additionally, utilize any resource you have to get the best possible outcome in Civilian Court. If they let you use Vet Court consider doing it, make sure to consult with an attorney. You want to show your chain that you are trying to recover from this.

I have seen NCO's come back from this on Active and in the Guard and Reserves.

Yes, your career is in jeopardy. You set yourself up for discipline and separation when you made the bad decision to drive under the influence of a drug. You made it worse by not immediately telling your boss you messed up. If I was your CO, I’d be talking to my first sergeant about how we can save or separate you. If you’ve been a good Soldier up till now, I might try to save you through a program of NJP, behavioral health counseling, and job reassignment. Otherwise: pack your stuff, you’re going home.

I would like to share this: My sister Brenda was killed in a head-on collision with a drug addict(alcohol was in the mix) in 2016, and ever since then I know that alcohol is a drug, so I don't say "alcohol and drugs" because our American civilian counterparts continue in this ignorance. Coming from a place of experience, not judgment, We Military Members should set the better examples for the civilians.