What are the benefits of the SPO course for Infantry Officers?

Caveat: In case you cannot tell by the "SFC" in front of my name, I am not currently, nor have I ever been, an Infantry Officer. I have also never been to the SPO course. So take this for what it is worth.

I literally cannot count the number of trainings I have gone to - from 1 day seminars to 6 month AITs, and everywhere in between. Every single one has been useful somewhere down the road. And usually in more than just the intended role. I used HAZ-12 (learned to certify HAZMAT shipments for Iraq deployment) over a decade later when discussing hazmat requirements when we moved to a new Barracks, of all things. I have used CLS, master driver, master resilience trainer, both of my AITs, PLDC, and more as a civilian.

If the Army wants to send you to a course.... go.

The SPO course is an incredibly valuable course. Are you branch transferring to a Sustainment branch?

For 90A you need to either to command and FSC of graduate from the Log Corps CCC unless they recently changed the regulation.

The point of the SPO course is to plan and execute multifunctional logistics (man,arm,fuel,fix, move,sustain soldiers and their system) for a BCT. They also go into detail on EAB to strategic level sustainment. It had not been focused on S4 functions, but S4s are a customer of a Support Operations shop, led by the SPO.

You have to consider the SPO as the S3 like the Fires S3, supporting maneuver. The Support Battalions have S3s but they are focused on battle tracking, battle space coordination, training and force pro. The SPO decides what is getting pushed when, ensuring the resupply pipeline is charged and anticipating requirements. They are also solving sustainment problems raised by supported units.