In the books (actually there are 23 volumes in the set) Ohio Soldiers, Sailors and Marines World War 1917-18 I looked at all surnamed starting with Sz and Sak and the closest I could find was Charles Szekely. Here's his info even though it doesn't seem to match up with your info.
Szekely, Charles 1002612. White, Lorain, O.; RA [Regular Army] Columbus Bks, O. Apr 24/15. Br Hungary. 28 4/12 yrs. [age]. Tr B 5 Cav to Apr 23/18; Tr B 315 Cav to Aug 19/18; Btry B 71 FA to Jan 26/19; Hq Co 24 FA brig to Feb 4/19; btry B 83 FA to June 11/19; Btry C 83 FA to Mch 24/20; Fur to res to disch. Sdlr Nov 1/15; Pvt Aug 11/16; Bglr Aug 11/16; Sgt Aug 9/18. Hon disch June 4/20. Abolishment of RAR [Regular Army Reserve].