consultation for a remodel project

Hello, I'm doing a remodel project for a house (built in 1970+) in Seattle and I am looking for consultation for for some structural questions. There seems to be some structural problem and I want to make sure that I am doing the right thing to reinforce the structure (like adding the joist, using the right screw for 6x6, check if the rafter is working as expected). I am looking for a structural engineer who is able to answer those structural questions.