Mix of. Large metros they'll use their own staff to install, rural Americana they'll use Dish's OnTech division. Dish realized they have an entire 'trained' workforce of cable/dish techs that they can put to other technical use, so they pushed into more managed hands tech services.

https://www.ontechsmartservices.com/

I noticed a more prominently branded "OnTech" van roaming around my rural slice of life that had a smaller Dish brand logo on it that seemed to be more of that side of the business.