The 'firm' is Brazos, which was run as a not-for-profit co-op. Here's a statement from the CEO who resigned describing a precursor event in 2014 and suggesting how the DoE should proceed to make a repeat less likely: https://www.energy.gov/sites/prod/files/2014/08/f18/karnei_s... It suggests the problems were systemic and interconnected, but at least some parts of the industry were aware of them.
https://www.texastribune.org/2021/02/26/ercot-resignation-po...