What do the S1 and G1 designations stand for?

CPT Private RallyPoint Member — Thu, 28 Jul 2016 21:27:05 -0400

What do the S1 and G1 designations stand for? Can anyone recommend any web resources for reference for the different military designations? Some of it is still new to me.

Response by PO1 John Miller made Jul 28 at 2016 9:42 PM

PO1 John Miller — Thu, 28 Jul 2016 21:42:25 -0400

Shouldn't a 1LT already know those things? :)
Anyway, I'm retired so I don't really give a damn so here you go (though please keep in mind these are not official sources):

https://www.quora.com/What-is-S1-S2-S3-S4-S5-and-S6-in-regards-to-the-U-S-Army
https://en.wikipedia.org/wiki/United_States_Department_of_the_Army

What is S1, S2, S3, S4, S5 and S6 in regards to the U.S. Army? - Quora

These are staff sections and positions in the Battalion or Brigade Headquarters. S1 - Personnel, S2 - Intelligence, S3 - Operations, S4 - Logistics, S5 - Civil Affairs, S6 - Communications. At the Battalion level the staff officers would normally be Captains with the exception of the S3 who would be a Major. To learn about the task organization and duties of these staff elements I will refer you to FM 101-5 Staff Organization and Operation. If...

Response by SGM Joel Cook made Jul 28 at 2016 11:32 PM

SGM Joel Cook — Thu, 28 Jul 2016 23:32:30 -0400

You can reference FM 41-10 for detailed by section info. The S in S1 means Staff Position. The G in G1 stands for general staff position. When I got my first General Staff Job as G6 SGM (General Staff Communications), I did not know what each General Staff section did by their numbers, with the exception of the ones I had dealt with on a regular basis. During the first staff meeting at special troops BN they had section plates in front of them so I wrote them all down for future reference. I can still remember G 1-9 but I am willing to bet the numbers have gone higher since I retired. Here are the ones I remember off the top of my head. G1 personnel, manning, admin, G2 intelligence, security, G3 Operations, G4 Logistics, G5 Plans, G6 Communications, G7 Training and or Combat Engineers, G8 Finance and resource management, G9 civil or public affairs.

Response by LTC Stephen C. made Jul 29 at 2016 12:06 AM

LTC Stephen C. — Fri, 29 Jul 2016 00:06:53 -0400

CPT Private RallyPoint Member, this link gives all you need to know to include the history of military staffing: https://en.wikipedia.org/wiki/Staff_(military)

Staff (military) - Wikipedia, the free encyclopedia

A military staff (often referred to as general staff, army staff, navy staff, or air staff within the individual services) is a group of officers and enlisted personnel that are responsible for the administrative, operational and logistical needs of its unit. It provides bi-directional flow of information between a commanding officer and subordinate military units. A staff also provides an executive function where it filters information needed...

Response by 1LT Private RallyPoint Member made Jul 29 at 2016 3:59 AM

1LT Private RallyPoint Member — Fri, 29 Jul 2016 03:59:04 -0400

Sir, Long story short they are the same composition in a sense however S1-S6 are affiliated with Brigades commanded by Field Grade Officers While the G's works for GO's namely Division.

Response by LTC Private RallyPoint Member made Aug 1 at 2016 5:50 PM

LTC Private RallyPoint Member — Mon, 01 Aug 2016 17:50:02 -0400

Don't forget J1.

Response by Debbie Pack made Aug 5 at 2016 12:35 PM

Debbie Pack — Fri, 05 Aug 2016 12:35:25 -0400

Can anyone tell me the contact information for the S1 of the 420th Engineering Brigade and the 321st Engineering Company?

Response by MSG Private RallyPoint Member made Aug 26 at 2018 1:39 AM

MSG Private RallyPoint Member — Sun, 26 Aug 2018 01:39:48 -0400

S1 = Administrative at the Company/Battalion/Brigade level. G1 is the same at the Division (or higher) level.

Response by AN Bill Ashton made Aug 26 at 2018 11:05 AM

AN Bill Ashton — Sun, 26 Aug 2018 11:05:18 -0400

S-1 is Supply Department 1st Division. G-1 is Weapons Department 1St division. Not sure what S-1 handled but G-1 Weapons Handling (Flight Deck, Forklift shop and AWSE Aviation Weapons Support Equipment. At least in the Navy lol I hope that helps!