Yes they do, that's why I said it like that.
In addition to the different teams (frosh, JV, Varsity) there are the position coaches as well.
Our local team (5th in state rankings) also has an othorpeadic MD and two trainers on the sideline. The local newspaper predicted standing room only 90 minutes before kickoff. We're expecting 800-10,000 fans.
Of course its the type of game where in the past we've had the local congressional rep lead prayer from the 50 yard line and the band plays Dixie.
The position coaches are usually the Freshman/JV coaches. Depending upon the size of the school/staff, they may have varsity assistants that don't work at all with the sub-varsity teams, but that's pretty much limited to the largest schools in Texas.
On Friday night, everyone's on the sidelines and/or in the press box. Jr. High coaches are scouting other teams. I'm sure there are exceptions to this rule in some places, but few and far between in Texas.
Standing room only for 10K fans? 10K is barely average around most of Texas, at least for larger school classifications, and I can only think of one or two local venues in that group where it would be SRO. Those are schools that were small schools 15-18 years ago and their stadiums were expanded but the expansion hasn't kept up.