Army 91D MOS: 6 Things to Know

Courtesy of U.S. Army

Are you familiar with the Army Military Occupational Specialty (MOS) 91D? The job is known as the Tactical Power Generation Specialist. By the end of this post, you will have a much better idea of what this Army job entails and it may help you decide if it is a MOS you would be interested in pursuing.

I would predict that there have been several soldiers holding this MOS helping out here in Puerto Rico since we were ravaged by Hurricane Maria. After all, nearly everyone on the island lost power and we are still without.

You may ask how I am writing this without power… It isn’t easy, but I invested in a solar panel, a marine 12 volt battery and an inverter. And I ask myself why I didn’t go solar much sooner.

But, enough of that… Let’s learn about the Army 91D MOS. Here are 6 things to know.

#1: Primary Responsibilities

The Army 91D is primarily responsible for maintaining power generation equipment for the United States Army.

He/she supervises and conducts maintenance and overhauls on:

  • Field utilities
  • Generators and power plants
  • Internal combustion engines
  • and any other related equipment

This all includes both stationary and mobile power equipment.

#2: Training

To become a 91D, soldiers must complete 10 weeks of Basic Combat Training (BCT) and 11 weeks of Advanced Individual Training (AIT) at Fort Lee, Virginia. AIT will consist of part classroom and part in the field learning first hand.

#3: Qualifications

Job qualifications for the 91D MOS consist of:

  • Very heavy physical demands
  • PULHES – 221121
  • Do not need to be a United States citizen
  • No security clearance required
  • ASVAB scores – either General Maintenance (GM) of 98 or General Maintenance (GM) of 88 and General Technical (GT) of 88.

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#4: Be Culture Aware

As you see in #3, U.S. citizenship is not required. 91D is a MOS that draws many foreign soldiers as power is ultra important in many other countries.

It is important you are aware and respect other cultures.

Good or bad, this can prepare you for deployment.

#5: Skills You Will Learn

Is the 91D a glamorous job? Not necessarily! But you will learn some great skills to carry with you even after your Army service. Some include:

  • Generator and power plant operations
  • Electrical generation and distribution
  • Diesel generator operation, disassembly, inspection and maintenance
  • Principles of electrical and electronic circuitry
  • and much more

#6: Additional Skill Identifiers

It is always a plus to add to your skills once you attain your MOS. For the 91D, recommended additional skills you may want to achieve are:

  • MAST and Electric Power Plant Maintenance. (C9)
  • Unmanned Aerial Vehicle Repairer. (U2)
  • and Hunter Unmanned Aerial Vehicle Repair. (U3)

Final Thoughts

Is it a sexy job?

Probably not!

But will you stay busy in your primary responsibilities?

I would say so! Just ask any commander who just had the lights go out in his headquarters.

And the possibilities of a career after Army service are immense. As a matter of fact, we could use many 91D’s here in Puerto Rico now.

Almost all major companies have backup generators to ensure business runs even if the power grid is down. You can be the power superstar.

So tell us, are you or have you been a 91D? Do you are did you stay busy? Tell us more about this MOS if you have been there and done that.

We appreciate all who provide more information to help those considering joining the United States Army, National Guard or Reserves.

Thanks for stopping in and

Go Army Strong!



About The Author

Greg Boudonck is a full time freelance writer and the author of over 50 books. He served in the United States Army in the early 1980’s and enjoys writing about military subjects. You can see Greg’s books on Amazon by searching his name and you can also visit his website at

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