ird ▁in ▁Baltimore , ▁Maryland . ▁Following ▁the ▁military , ▁he ▁returned ▁to ▁Y ale , ▁ear ning ▁a ▁law ▁degree ▁in ▁ 1 9 6 4 . ▁His ▁career ▁began ▁immediately ▁at ▁the ▁Wall ▁Street ▁invest ment ▁bank ing ▁establishment ▁White ▁W eld ▁& ▁Co ., ▁where ▁he ▁became ▁one ▁of ▁its ▁young est ▁partners ▁by ▁ 1 9 6 8 . ▁After ▁his ▁departure ▁from ▁the ▁firm ▁in ▁ 1 9 7 0 , ▁he ▁spent ▁more ▁than ▁a ▁de cade ▁as ▁a ▁stock ▁market ▁invest or ▁and ▁vent ure ▁capital ist . ▁ ▁He ▁served ▁on ▁the ▁U . S . ▁Commission ▁of ▁Fine ▁Arts ▁from ▁ 1 9 7 6 ▁to ▁ 1 9 8 0 . ▁ ▁Begin ning ▁in ▁ 1 9 8 3 , ▁he ▁formed ▁an ▁invest ment ▁firm ▁with ▁Peter ▁G . ▁Pet erson , ▁who ▁had ▁stepped ▁down ▁as ▁the ▁President ▁of ▁Le h man ▁Brothers . ▁ ▁The ▁partners hip ▁last ed ▁for ▁a ▁few ▁years ▁until ▁Pet erson ▁left ▁to ▁create ▁the ▁Black stone ▁Group ▁with ▁Stephen ▁Schwar z man . ▁Jacob s ▁then ▁established ▁his ▁own ▁firm , ▁Manh attan - based ▁E . S . ▁Jacob s ▁& ▁Co ., ▁in ▁ 1 9 8 6 , ▁he ▁built ▁a ▁invest ment ▁port folio ▁with ▁invest ments ▁in ▁private ▁equ ity , ▁vent ure ▁capital , ▁and ▁real ▁estate . ▁In vest ments ▁included ▁cont rolling ▁interest ▁in ▁Mem ore x ▁and ▁Tri angle ▁Pacific ▁Cor p ., ▁a