▁United ▁States ▁Amb assador ▁to ▁Bur und i ▁from ▁ 1 9 7 4 ▁to ▁ 1 9 7 7 . ▁ ▁From ▁ 1 9 7 9 ▁to ▁ 1 9 8 1 ▁he ▁served ▁again ▁at ▁the ▁State ▁Department ▁as ▁a ▁Deput y ▁Ass istant ▁Secretary ▁of ▁State . ▁After ▁ret irement ▁from ▁government ▁in ▁ 1 9 8 1 , ▁he ▁consult ed ▁on ▁international ▁affairs ▁for ▁AL CO A ▁in ▁Pitts burgh , ▁Pennsylvania . ▁ ▁Mark ▁spoke ▁fl uent ▁Russian , ▁German , ▁and ▁French , ▁and ▁was ▁convers ant ▁in ▁Portuguese , ▁Spanish , ▁Italian ▁and ▁Japanese . ▁With ▁the ▁break - up ▁of ▁the ▁Soviet ▁Union ▁in ▁ 1 9 8 9 ▁and ▁the ▁dear th ▁of ▁Russian ▁lingu ists , ▁Mark ▁was ▁asked ▁to ▁help ▁establish ▁the ▁American ▁Emb ass y ▁in ▁the ▁former ▁Soviet ▁Republic ▁of ▁Georgia . ▁He ▁returned ▁to ▁T bil isi ▁in ▁ 1 9 9 2 ▁to ▁particip ate ▁in ▁helping ▁the ▁Georg ians ▁write ▁their ▁Constitution . ▁ ▁During ▁the ▁ 1 9 9 0 s ▁until ▁his ▁death , ▁Mark ▁was ▁an ▁active ▁member ▁of ▁the ▁Council ▁on ▁Foreign ▁Rel ations ▁in ▁New ▁York ▁City . ▁He ▁volunte ered ▁every ▁week ▁for ▁nine ▁years ▁as ▁a ▁guide ▁and ▁transl ator ▁for ▁Big ▁Apple ▁Gre eters ▁of ▁New ▁York . ▁He ▁worked ▁full - time ▁as ▁a ▁lic ensed ▁New ▁York ▁City ▁tour ▁guide ▁for ▁Gray ▁Line / Co ach USA . ▁When ▁he ▁was ▁not ▁volunte ering ▁and