has anybody heard of 618 ordnance amm company in world war 2 any info would be helpful and on my grandpas report of seperation what does the (014)next to automotive mechanic mean thanks for all the help

Tricky one, as with many support units it seems to have been hidden in an attachment to a special unit.

618th Ordnance Ammunition Company.
Landed D-Day Jun 6th 1944,participated in the liberation of France and the push into Germany.
Info as per DA Pam 672-1 (with changes 1-4)
Campaigns:
Normandy (30), Northern France(32), Rhineland(34)
Unit Awards:
Distinguished Unit Citation 6 Jun 44 (WD GO 4-45)
French Croix de Guerre 6 Jun 44 (DA GO 43-50)

Seems to have landed on D-Day attached to the 6th Engineer Special Brigade as part of the 74th Ordnance Battalion.
The 6th ESB has Campaign credit for areas 26,30,32,and 34 (but only it's HQ Companies for 34)and did occupation duty in Germany.
The 74th Ordnance Battalion only has credit for area 26.
The 618th has credit for 30,32,34 so the 618th was not with the 6th ESB during campaign 26.

So it seems it landed at Normandy(6 June-24 July 44), went thru Northern France(25 July -14 Sept 44), took part in Rhineland Campaign(15 Sept 44 -21 March 45) but did not take part in Central Europe(22 March-11 May 45) and did no Occupation Duty.

I can find no clear history (at this time)that says the 618th stayed with the 6th ESB and was not attached to other units. Clearly it was doing something different than the 6th ESB after March 45. If it(and the other companies attached to the ESBs) were reasorbed into the 74th Ord. BN. (which only has campaign 26 credit) there is no notation of that in DA Pam 672-1.

The 014 is probably the code number for his job, automotive mechanic.

thanks so much for the information i do have a few guestions if you didnt mind . what is per da pam 672-1(with changes 1-4). and is there a way to know what they got a unit citation for.and also what do you mean by areas 26,30,32,34 and is there any way you could tell me were i can find this info.and thanks so much i have been trying for a long time and cant really find anything that comes together i do have his discharge but dont know how to read it right .

Unit Awards and Campaign credit is issued thru what are called General Orders. They state the time period, unit and award. Individuals don't get a paper copy with their name on it.
DA Pam 672-1 is the Department of the Army Pamphlet that list Campaign Credits for Army Units and the GO that covers them.
672-1 varies by date. If you look in a current copy there would be no WW2 credits listed. For WW2 you need a copy dated July 1961 with changes 1-4 added. The changes added and changed unit info years later. The Army does not reprint such registers as corrections are made, they just issue 'changes' which are added to the front of the register.
The date of the 618th Distinguished Unit Citation is 6 Jun 44 so it's for their actions as a unit on D-Day. No specific actions, just as an overall group.
The numbers are just the number codes used in 672-1 for the different campaigns. Your grandfather would have received the EAME Campaign Medal with three little bronze stars on it. Each star would have been for each of the campaigns he participated in.

EAME=Europe,Africa,Middle East Campaign Medal
ACM=American Campaign Medal
WW2VM=WW2 Victory Medal
WD=War Department
DA=Department of the Army
GO=General Order

He most likely received the ACM,EAME,WW2VM according to DA 672-1 the French Government awarded the Croix de Guerre (War Cross Medal) to his unit, which is worn as a foreign award after his US awards. He may never had known about that award as it seems to have came after the war.

Try searching for 6th Engineer Special Brigade,
74th Ordnance Battalion, or 618th Ordnance Company. Your grandfather's history appeares to be tied to these three units but as a 'unit within a unit' it is sometimes not clear. His unit was a sepcialist support unit (ammunition) and was always part of a larger command.

DA 672-1 is availble on the web usually in an Adobe pdf format. Just make sure it's the July 1961 date but it's not an easy read. Lots of abbreviations and official acronyms.

thanks again so much for the info you are so helpful god bless