He's got some great vids for sure, but what really helped me was fellow treehouser Gerry's fundamentals of general tree work. It's a book, i believe it might even be out of print now (huge crime against humanity), that is about 700 pages long covering everything to various cuts in the tree, sharpening chainsaws, work positioning, advanced tree felling, and more shit than you will remember in a lifetime. I personally don't own them, but his working climber series of videos would be the go to imho. His climbing section seems outdated compared to today's gear intensive srt stuff, but make no mistake, the techniques can and still are used to this day to do tree work to levels greater than i will ever achieve. He has spent a lifetime gathering materials for these two works, and finally compiled them when an injury slowed him down. They might seem pricey, but please trust me you will learn so much that might save your life. I lack words to express how good his work is.
In the YouTube vein, August Hunicke has the best stuff out there (even he recommends Gerry's stuff), and he is located in Oregon as well so the trees will be the same as what you are working in. His work is very advanced, so remember that when watching him rig large pieces and bomb stuff, that takes a lifetime to make look as easy as he does it. RegC is another treehouser (as is August, in fact the beauty of this forum is these guys are here and actively participate to teach idiots like myself) who has excellent videos illustrating amazing tree work, and now lives in B.C., so he's also in your biosphere. Congrats on the new job, and the promotion. Go slow, and do not try to impress anyone ever. This job will take you to decisions that may kill you, and so you need to learn slow enough to understand the risks that you are undergoing. Read as much of the archives here as possible, and don't be afraid to ask questions.