▁his ▁rabb in ic ▁ord ination ▁at ▁Yes h iva ▁Tor ah ▁V oda ath . ▁ ▁and ▁a ▁second , ▁advanced ▁sem icha ▁from ▁Rab bi ▁Mos he ▁B iny amin ▁Tom ash off , ▁who , ▁when ▁he ▁was ▁ord ained , ▁called ▁him ▁" am ong ▁the ▁most ▁gift ed ▁of ▁his ▁generation ." ▁ ▁Early ▁career ▁and ▁marriage ▁In ▁ 1 9 4 7 , ▁at ▁age ▁ 2 1 , ▁Riv kin ▁was ▁appointed ▁a ▁ro sh ▁yes h iva ▁( de an ) ▁at ▁Yes h iva ▁Rab bi ▁Cha im ▁Berlin ▁school ▁in ▁Brook lyn . ▁However , ▁in ▁ 1 9 4 9 , ▁at ▁the ▁encourag ement ▁of ▁the ▁sixth ▁Lub av itch er ▁Reb be , ▁Rab bi ▁Y ose f ▁Y itz ch ok ▁Schne ers ohn , ▁Riv kin ▁moved ▁to ▁St . ▁Louis , ▁Missouri , ▁to ▁become ▁the ▁ra bbi ▁of ▁the ▁N us ach ▁Ha ' A ri ▁con greg ation . ▁He ▁also ▁became ▁the ▁Jewish ▁chap lain ▁at ▁the ▁V eter ans ▁Administration ▁Hospital ▁at ▁Jefferson ▁Bar ra cks ▁and ▁an ▁administrator ▁and ▁coun sel or ▁at ▁Ep stein ▁Heb rew ▁Academy . ▁ ▁In ▁ 1 9 5 4 ▁married ▁Pa ula ▁Z uck erman , ▁the ▁only ▁child ▁of ▁Rab bi ▁D ov ▁Ber ish ▁Z uck erman ▁and ▁H inda ▁Z uck erman . ▁Pa ula ’ s ▁family ▁had ▁fled ▁Austria ▁after ▁the ▁an nex ation ▁of ▁Austria ▁into ▁Naz i ▁Germany