How does someone get a letter of recommendation from a warrant officer when they don’t have a warrant officer in their unit?

Your best bet is to introduce yourself at your closest AASF (ARNG Aviation Support Facility). I am sure if you walked into flight ops (or where your Flight Facility receives visitors), you will have an opportunity to introduce yourself and ask to speak to one of the Facility IPs. Most are open to giving a tour, answering questions, and if asked, may be willing to provide an LOR in return for an interview. Make sure you have a good chunk of your packet complete and with you. If a young soldier wanted an LOR from me and they had their documentation with them to make the sales pitch, I’d be inclined to hear them out. Additionally, the tenacity it takes to walk into a den of Warrant Officers to introduce yourself shows “people skills” and determination. All good things we look for in future Aviators!

Best of Luck!

I was just talking to the warrant recruiter in Sacramento about this yesterday morning (how do you get a letter if you don't know any warrants?)
I assume you are working with the warrant recruiter for So Cal.
The usual route is for the recruiter to forward the relevant parts of your packet (ERB, etc) to a few warrants at the aviation unit near you, (JFTB in your case), head over there to meet a few of them, and then have a more formal sit down interview with the CW3 who will write your letter.

Since you are in the guard, I assume that you are consulting with an assessions NCO. Often they have such contracts. Ask that NCO

You can also get LORs from state or federal officials

WO recruiting page has POC for the MOS proponent. Contact them. Ask your question.

I highly recommend you have your packet near completion prior to going to speak with a senior warrant. That shows you have been working hard to complete the packet and that you are serious. Most senior warrants won't write a LOR just because you need it. It's all about showing the drive and desire to pursue your aviation career.

While considering my WO packet submission, I went to an aviation unit and asked to talk with their chief.
We had an informal talk but if I had pursued it he was willing to recommend me.
It can be as simple as that.
Really your recruiter should be working to help you find one.
If not, you may need to consider a component change.

When I was trying to go 153A, I completed my entire packet, took it to a 153A CW3 and let him know what my aspirations were and why. After we talked, I left for my physical, only to find out two days later that I didn't meet the vision standards. The warrant that I spoke with was willing to write my LOR upon completion of my physical because, and I quote, "You had the nerve to walk in here, not knowing who any of us are, and put yourself out on a limb and try. Trying and showing that you will do whatever it takes goes a long way". I was also a SGT with 6 years in, and a degree in Aeronautical Engineering. I have learned throughout my career that you are in charge of your career and only you determine where it goes. I encourage you to be tenacious and follow the proper channels. I have since submitted my packet for my career field and it is a daunting process but it will be worth it if/when you get selected. Good luck!

PFC Gale, If you are working with a Warrant Officer Recruiter I am sure the advice that has been given in reference to finding an Aviation Warrant Officer is probably accurate. However, I suggest you work with the other Warrant Officers in your Unit to have them assist you in getting your packet together. I assume that when you say "no Warrant Officers in your Unit" you are speaking specifically to your Battery and would suggest you go to the HHB within your BN (which should have 1-3 Warrant Officers. Additionally, depending on what type of BDE you are in Maneuver BDE or Field Artillery Brigade there will be between 2-6 131A FA Targeting Warrant Officers and approximately 10 other Tech Warrant Officers who could give you some assistance.

I assume you are working with a warrant recruiter, he can introduce you to several W.O.'s and most will want to interview you before they will talk about the LOR.