Something that I'm very interested about is why and when the S1 archive crew joined the institute in the first place. I was planning for a fanfic and that made me looking through their wiki and reread the transcripts.
Jon and Tim are easy, both had been mentioned in the podcast.
Jon had mentioned being a researcher for 4 years by the time canon happened, which took place in 2015, which means he joined in 2011. As for the reason, well, A Guest for Mr. Spider. I don't think it was ever mentioned specifically but I think it's very clear that he wanted to know more about the Leitners.
Tim took a bit of thinking, in the "when". The incident of his brother took place in August, 2013. We can assume that mean he joined the institute around late 2013, because he left his publishing job to find out what happened to Danny. Which, I'm gonna be honest, surprised me when I first saw it.
Every fanfic I've ever read seems to make Tim already working in the institute when Jon joined, which is not true, Tim joined 2 years after Jon. I do understand the confusion, Tim and Sasha feels much closer to each other than Jon to either of them, so you would think they know each other for way longer than with Jon. I guess there's a possibility that Tim already knew Sasha before the institute and maybe she is the reason he knew it existed in the first place. Either way, it's a gripe for me now if anyone mentioned Tim being in the institute for longer than Jon.
Martin, we know why, he's a drop out that needs a job because of his mom. Elias most definitely knew that he lied on his CV and hired him anyway because no one will miss him and he can use him or something, perhaps even because he thought it would be interesting to put someone with a big secret to work in a place that was made for a god of getting secrets out of people. As for when, however, it was never mentioned. We can make a guess, he was mentioned to have seen a statement giver from 2009, so he's already work for the institute in 2009 at the latest, and judging by him being 29 in 2016, he dropped out in 2004. Meaning by the time he was transferred to the archive, he had worked for appoximately between 6-11 years. Which mean, also, he is potentially the one that worked in the institute the longest.
Now, we get to the one who we know nothing at all, Sasha. The only thing we know is that she at first worked in artefact storage for 3 months before transferring to research. She said she had been in academia for 10 years, but that doesn't necessarily mean she had been working at the institute for that long, because she said "Iāve been in academia" and not "Iāve been working here". Of course, it's up to interpretation. We know she knew Gertrude and had talked to her, but knowing Gertrude, this is probably in 2011, after Emma died. I do believe she most likely had been there for longer than Jon, since that could also made her more qualified for the Head Archivist position (if this is a normal job). My personal belief is she started working there around 2009/2010. For the "why"... Sasha never mentioned ever having an encounter before Michael, so that's probably not it. She most likely joined because it's a research job. She also mentioned she couldn't afford to quit after artefact storage, so she was probably also desperate for a job, just like Martin.
Then again, we all know how fucked the timeline is in TMA (looking at you, Jonny) so maybe the "when" are all completely incorrect, who knows!
If anyone had any thoughts or corrections, feel free to share! - š»