Posted on Jan 18, 2026
DeShawn Edwards
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Hello I recently enlisted as a 12N. I was wondering what was it like being a Horizontal Construction Engineer. I heard that you sit around in the motorpool all day when there is no work. But when there is work, you work for days to weeks straight. I was hoping to get some insight on this MOS.
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Sgt Field Radio Operator
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DeShawn Edwards Here is a previous post that will provide some insight. You can search on "12N", then click answers to review the other posts that cover this MOS. Good luck!
https://www.rallypoint.com/answers/what-does-12n-hours-look-like-as-army-active-duty
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SGM William Everroad
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DeShawn Edwards, I would take a look at the resources Sgt (Join to see) posted.

To add some context, a 12N junior enlisted is a construction equipment operator. Big construction equipment. So a lot of your time is spent making sure your equipment works by maintaining it and logging hours in it. Maintenance days are important in the grand scheme of things. If your stuff doesn't work, you can't do the mission. That is how the Army can keep a piece of equipment running for decades. A given engineer company has a few different types depending on mission sets from graders and scrapers to various other types of earthmovers and equipment haulers.

That is a lot of equipment, however, it is one of the best MOSs for transferable jobs skills after service. Every MOSs, minus some very niche excepts, has maintenance days in the motor pool. But if you keep the context in mind, it makes sense.
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MSG Intermediate Care Technician
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Remember that each story you hear is either an embellishment or understatement. Think of it like "Two Truths and a Lie." Each person, no matter the MOS, will have two different sets of experience....even if they were in the same unit at the same time.

Yes, you will be in the motor pool doing maintenance. Yes, you will be in the field digging. How much/often for each will all depend on the OPTEMPO of the unit you're assigned to. Take what those folks said with a grain of salt and decide for yourself after a few months of getting assigned.

Welcome to the Engineers. Essayons.
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