es . ▁By ▁ 1 9 4 1 , ▁standard ized ▁test ▁scores ▁had ▁been ▁recorded ▁for ▁more ▁than ▁a ▁million ▁military ▁men . ▁His ▁planning ▁and ▁consult ing ▁services ▁to ▁the ▁army ▁in ▁World ▁War ▁II ▁are ▁acknowled ged ▁by ▁the ▁ins cription , ▁“ arch itect ▁of ▁the ▁classification ▁system ▁of ▁the ▁army , ▁ 1 9 4 0 – 1 9 4 7 ,” ▁which ▁appears ▁on ▁his ▁head stone ▁in ▁Ar ling ton ▁National ▁C emetery . ▁ ▁Professional ▁life ▁ ▁Through out ▁his ▁ten ure ▁with ▁the ▁American ▁military , ▁B ingham ▁continued ▁to ▁hold ▁a ▁variety ▁of ▁professional ▁roles . ▁He ▁remained ▁Director ▁of ▁the ▁Person nel ▁Research ▁Federation ▁at ▁Car neg ie ▁and ▁assist ed ▁in ▁editing ▁the ▁Person nel ▁Journal ▁which ▁he ▁helped ▁found ▁at ▁Car neg ie ▁in ▁ 1 9 2 2 . ▁He ▁served ▁as ▁president ▁of ▁the ▁Psych ological ▁Corporation ▁from ▁ 1 9 2 6 ▁to ▁ 1 9 2 8 ▁and ▁was ▁appointed ▁professor ial ▁lect urer ▁in ▁psych ology ▁at ▁Stevens ▁Institute ▁of ▁Technology ▁in ▁ 1 9 3 0 . ▁App lied ▁psych ology ▁grew ▁in ▁importance ▁during ▁and ▁immediately ▁following ▁World ▁War ▁I , ▁and ▁B ingham ▁came ▁to ▁hold ▁many ▁responsible ▁positions . ▁ ▁As ▁a for ement ioned , ▁he ▁served ▁as ▁executive ▁secretary ▁of ▁the ▁Committee ▁on ▁Classification ▁of ▁Person nel ▁in ▁the ▁army ▁in ▁ 1 9 1 7 – 1 9 1 8 ; ▁he ▁held ▁the ▁rank ▁of ▁lieutenant ▁colon