ENTERPRISE SOLUTIONS FRAMEWORK (ESF) FOR MULTI-TIERED ACQUISITION FRAMEWORK FOR SYSTEMS ENGINEERING AND INTEGRATION -- PROGRAM TIER THIS AWARD IS BEING MADE TO A CONTRACTOR TEAMING ARRANGEMENT (CTA) WITH THE FOLLOWING TWO CONTRACTORS: CTA LEAD: T-REX (DUNS: 062808535), GS-35F-022BA CTA MEMBER: Z INC. (DUNS: 116207838), GS-35F-453BA