This is referred to as a "company front". Inside, they just play in this formation and the color guard is behind them doing their thing in place as well. JC is the third sousaphone from the right. If you squint.
This was when they came back in and were waiting for the scores. Notice our kids are still in neat rows and at parade rest. Other bands were seated in the stands, and a couple of kids started running around the room trying to get people to do the wave while we waited. Our kids never cracked. It was very impressive, actually.