Tuhia he tomokanga mō tēnei wāhanga - Mai i Whiringa-ā-rangi 1999 ki Whiringa-ā-rangi 2001, ko ia te Kaiwhakahaere mō ngā Raruraru Whakawhiti-Iwi i runga i ngā kaimahi o te Kaunihera Haumarutanga ā-Motu (NSC), i reira i kawenga ai ia mō te whakakotahitanga me te whakatinanatanga o te kaupapa here a te US ki te whakaeke i te rerenga. I tēnei wā, i whakahaerehia e ia te urupare a te Kāwanatanga o Amerika ki te whakatūpato whakamataku o te Mileniuma, te whakaeke a USS "Cole"
, me ngā whakaeke o Hepetema 11. I a ia e mahi ana i te NSC, i karanga a Cressey kia tangohia nga kaupae ki a al-Qaeda me Bin Laden, i tino kore e aro ki a 9/11.