Okay, the ratty first crew out at the neighbors' retaining wall was apparently demolition, and then the more professional one was excavating all the dirt behind it, now this third crew looks like they're probably licensed but works (hires, finds jobs…) by word of mouth within Asian immigrant communities
Like, the first was guys in Cascadian 2008 outdoor workwear, probably from a thrift store, the second had jumpsuits and high-viz jackets, these guys have matching blaze orange t-shirts