▁Sam son ▁Energy , ▁a ▁deep water ▁dr illing ▁company ▁whose ▁main ▁assets ▁are ▁on ▁the ▁G ulf ▁Coast ▁of ▁the ▁United ▁States . ▁She ▁serves ▁as ▁its ▁chair ▁and ▁chief ▁executive ▁officer . ▁ ▁In ▁ 1 9 9 1 , ▁with ▁Michael ▁W . ▁D ard ick , ▁Sch ust erman ▁co - f ounded ▁Gran ite ▁Properties , ▁a ▁Pl ano , ▁Texas - based ▁real ▁estate ▁invest ment ▁company . ▁The ▁company ▁own s ▁buildings ▁in ▁Los ▁Angeles , ▁California , ▁Atlanta , ▁Georgia , ▁Dallas , ▁Texas , ▁Houston , ▁Texas , ▁and ▁Den ver , ▁Colorado . ▁By ▁ 2 0 1 5 , ▁it ▁had ▁an ▁annual ▁re venue ▁of ▁$ 1 8 2 . 7 ▁million ▁and ▁ 1 5 0 ▁employees . ▁ ▁Sch ust erman ▁is ▁also ▁the ▁founder ▁of ▁Black ▁Cor al ▁Capital , ▁a ▁Boston - based ▁clean ▁technology ▁invest ment ▁firm . ▁ ▁Phil anth ropy ▁Sch ust erman ▁co - ch airs ▁the ▁Charles ▁and ▁Lyn n ▁Sch ust erman ▁Family ▁Foundation , ▁" the ▁largest ▁Jewish ▁family ▁foundation ▁in ▁America ", ▁with ▁her ▁mother . ▁She ▁also ▁serves ▁as ▁the ▁president ▁of ▁Bez ale l ▁Foundation , ▁a ▁non - pro fit ▁organization ▁which ▁end ows ▁Jewish ▁causes . ▁Additionally , ▁she ▁serves ▁on ▁the ▁board ▁of ▁trust ees ▁of ▁the ▁American ▁Israel ▁Public ▁Affairs ▁Committee ▁( A IP AC ) ▁and ▁B BY O . ▁She ▁also ▁serves ▁on ▁the ▁international ▁board ▁of ▁govern ors ▁of ▁H