Other than Special Forces and Rangers, what are some other “high speed” and high specialty jobs in the Army?

Here's the truth: you're not high speed. It will take time to prove that you are and separate yourself from everyone else who feels they are. If you aren't a Collegiate level athlete then you probably won't pass any "high speed" selection process. If you aren't a high school athlete then you almost definitely won't pass a selection.

If you fancy yourself tough and "high speed" join the Infantry with an Airborne contract and volunteer for the 75th Ranger Regiment while in Airborne school. All Special Operations require Airborne so it's a good start.

Around 90% of people who join the Army on an Option 40 Ranger or 18X Special Forces contract will fail to complete the training. You will most likely fail to meet the training. Start by aiming smaller. Aim small, miss small.

The Army is High Speed. What you should do in the Army will be based on your scores and what is available, that simple. Once you enter the Army you will need to work hard in all areas to prove that you have what it takes for one of the more challenging units. So, if you want to serve, serve for Duty, Hojor, Country. Work hard, study your craft and be a Team player, then at some point you will know what it is you want to do. If you are worthy the Army will see your potential and allow you to compete. The Army is High Speed.

There are a number of supporting MOSs in elite formations such as the Ranger Regiment, SF Groups (like the GSB), 160th SOAR (the Regiment has sustainers), Airborne Units have conventional logistics support with jump status BSBs. They just did away with Division Pathfinder Comoanies. They were pretty high speed.

SFABs candidates go through a selection process.

The Asymmetric Warfare Group also have a selection process.

Technical Escort - Mix of EOD and CBRNE troops

LRSCLRSD unfortunately no longer around.

Not a formal thing, more of how Commander's approach the mission: many BSBs task organize a standing security Platoon. Ours took soldiers from all comoanies and trained them on convoy defense, fighting mounted, communications, every weapon in the element and anything in the BN. Hell, I saw one that was able to cross train a 60mm mortar crew to hipshoot when they got in contact. The security Platoon was four elements with four MRAPs, one PLS with trailer, and a M984E1 wrecker that was task organized to be the patrol leadership (combat logistics patrol - CLP). Armed to the teeth. Had dedicated medics. Mix of M2s and Mk19s. they had live AT4s, frags, etc The convoy was formed around one or two of these elements based on size. They could call for fire. They could and did call in CAS. They often had to clear their own routes as route clearance was unavailable. They worked with Afghan police and other Afghan security forces to secure key terrain that overwatched routes. Not your Daddy's convoy. Everything ran as the combat operation that it was. We coordinated ISR coverage, fire support, attack aviation, and battlespace deconfliction.

Units often put together a Personal Security Detachment PSD to move the Command Group around the battlefield. The CSM usually hand picks people to perform this mission and they part of the HHC.

Perhaps, don't be concerned with the pedigree of the formation or the High speed MOSs and be the highest speed <insert MOS here> and be proficient in your warrior tasks and drills. Another key is to be reliable.

An MOS does not make you high speed, I have two Soldiers who won the Eropean Soldier of the year competition, my BN has the title two years in row, that's high speed! High speed is not determined by a tab or title, but by demonstrated performance.

Special Operations is the cherry on top of the Sunday: it looks pretty and tastes good, but it isn't the main attraction and alone it's just a cherry. Any infantry unit in the first order of battle will do. You will be high speed then.

Of course, you've framed your question around a physical characteristic and that is really just begging the question. Just keep in mind that the meanest hombre of the meanest unit is nothing without support. We didn't win WWII through brute force alone: the "Miracle at Midway" occurred because we had good intelligence and crack repair crews that brought the Yorktown back into the fray. "High Speed" is a frame of mind, my friend, whether you're Caspar Milquetoast or John Wayne: just be the best at what you do and you'll be "High Speed"!

There are plenty of comments about the high speed jobs. I will say from experience, one other avenue to consider, and it may be difficult, but think of what you'll want to do once your contract is up. Whether its after 3, 10, or 20. You never know what can happen. The army will always keep moving forward, but you need to set yourself and family if you have one up for a good future. You can't run and gun your whole life despite your heart wanting to. Just an alternate perspective.

Best advice? Avoid possible homelessness and just go POG.
There's three things you can find in every homeless shelter across the country. Dirty clothes, depression and blue cords.
Body stacking briefs well, but a blue cord and $5.00 will get you a venti white chocolate mocha at Starbucks.
You're not going to find logisticians or topographical analysts at the homeless shelters going "if only I had stacked bodies I could have avoided this!".

I would think that a high speed/high specialty job is the job you pick that gives you: 1) A sense of pride; 2) Good/great promotions; 3) A skill set to provide a high paying career outside of the military.

These jobs could be in the Intel community, Communications community and the Medical community.

That being said, every job gives a Soldier exactly what they put into it. For example, I am a Preventive Medicine NCO. As a SFC in this field, there are not a lot of SFC 68S (Preventive Medicine). It is a low density MOS. Which means that there are not a lot of options for us, per say. Rank progression can be slow (hence why there aren't a lot of Senior NCOs in the 68S world). I went from an E-4 to E-7 in just over 11 years. I've known Medics and Combat Engineers that retired after 20 years as an E-6. That being said, there are opportunities to do great things. There are 68S slots in the SF community (in their support elements). But even then, in a support roll in the SF community, you better damn well bring your A-Game.

The definition of your "High Speed" will point the way.

The difference between brawn and brain. Counterintelligence or HUMINT within the intelligence field could be somewhat high speed. But just like high school. You want to be a jock or a nerd? Or you can be a geek and do cyber. It’s really all fun no matter what you do. The Army is a blast but you get what you put into it. Good luck!