▁political ▁science ▁at ▁the ▁Max well ▁School ▁of ▁Cit iz ens hip ▁and ▁Public ▁Affairs ▁at ▁Sy rac use ▁University . ▁In ▁ 1 9 5 2 ▁and ▁ 1 9 5 3 ▁he ▁was ▁part ▁of ▁U . N . ▁spons ored ▁miss ions ▁in ▁public ▁administration ▁in ▁Colombia , ▁the ▁Philippines , ▁and ▁Japan . ▁His ▁next ▁one - year ▁U . N . ▁appointment ▁was ▁as ▁co - Direct or ▁of ▁the ▁Public ▁Administration ▁Institute ▁for ▁Turkey ▁and ▁the ▁Middle ▁East ▁in ▁An k ara , ▁Turkey . ▁Indiana ▁University ▁then ▁appointed ▁him ▁director ▁of ▁the ▁Institute ▁of ▁Training ▁for ▁Public ▁Service ▁and ▁Co ordin ator ▁of ▁Indones ian ▁and ▁Th ailand ▁Public ▁Administration ▁Program s . ▁By ▁the ▁time ▁of ▁his ▁ret irement , ▁further ▁appoint ments , ▁research ▁and ▁lecture ▁t ours ▁and ▁vac ations ▁had ▁enabled ▁him ▁to ▁visit ▁nearly ▁one ▁hundred ▁countries ▁around ▁the ▁world ▁as ▁well ▁as ▁every ▁state ▁in ▁the ▁union . ▁In ▁ 1 9 5 6 , ▁after ▁a ▁year ▁as ▁visit ing ▁professor ▁of ▁government ▁at ▁the ▁University ▁of ▁California , ▁Ber keley , ▁he ▁returned ▁to ▁Blo om ington ▁as ▁Professor ▁of ▁Government ▁at ▁Indiana ▁University , ▁where ▁he ▁remained ▁until ▁his ▁ret irement . ▁In ▁the ▁course ▁of ▁his ▁career ▁he ▁secured ▁ 2 1 ▁National ▁Science ▁Foundation ▁gr ants ▁to ▁support ▁his ▁research . ▁ ▁During ▁his ▁career , ▁C ald well ▁served ▁on ▁the ▁fac ult ies ▁of ▁the ▁University ▁of ▁Chicago , ▁North western ▁University ,