The design team was appointed after a design competition in the mid-1990s. The architectural concept for the stadium was developed by the Los Angeles-based sports and entertainment team NBBJ, who worked closely with a Los Angeles-based team of engineers Arup, who were responsible for all stages of the structural and building services engineering design for the stadium, with the exception of the mechanical mechanisms that move the roof structure. The original versions of these mechanisms were designed by Mitsubishi Heavy Industries America as part of a design and build contract, but they have now been replaced by new designs after their failure. The executive architect responsible for the delivery of the final stadium design was a Dallas-based team of HKS, Inc. In addition to these major players there were a significant contributions from local teams including Eppstein Uhen Architects.