Any recommendations for Industrial Hygenists?

Hello, overwhelmed Pasadenan here. Sorry if this well-tread ground for other folks, but I am trying to figure out where to start to hire an IH to assess what is safe in my apartment that may have smoke damage. Insurance is not helping (I am a renter and our place wasn't a total loss so I suspect we're on the bottom of the pile), landlords are going about their business like nothing happened, so this is the only thing I can think of that I could possibly do to at least figure out if my belongings are salvageable.

Thanks in advance for any advice!