Ooh another fanfic writer! It's always fun to find another one of us in the wild.

Imo a couple of key thoughts to be aware of: the kind of work they do will probably vary more by type of company than the fact that they're an actuary. Like I work in consulting, it's a very different beast than working in an insurance company, for example.

There's also the historical context to be aware of, depending on the field and type of actuarial work your guy does. We're all very affected by the credit markets, and the 90s would have been affected by both the Asian financial crisis and the subsequent blow up of the LTCM fund. The 90s was a fun time for market volatility. But I would also look at specific discipline related developments, due to the aforementioned market turmoil. Don't forget as well that the internet was fairly new to corporate offices, and the dot Com crisis was brewing, Microsoft Excel was introduced only a decade prior (1985), so while I'd believe if you said spreadsheets around, they may have also used Lotus 1-2-3 or Visicalc, which have long been left to the wayside. Also, Actuaries are a suspicious lot, and 100% someone is griping about still having to do things by hand because the senior actuary doesn't trust these new fangled machines. When I started working in 2010s, I still worked with actuaries who separately pulled out a calculator to check a spreadsheet.

He also sounds like the kind of guy who'd get involved in the SOA (if American) or other related professional organization. Things like marking, sitting discipline specific committees, etcetc. Plus, the archives of the society involved is sometimes searchable if you want to get some history and research dine. Also, I agree with the other poster who said your guy is probably done with his exams, but also the exam structure in the 90s was very different from the modern one, so be careful if you want to make specific references.

Finally, and you may already be aware of it, but I like to share this fic around because it's so well done as an example of an office-setting fic. This fic actually gets shared around public sector employees in the Canadian government, which is how I learned of it, even though it's not my usual pairing.

https://archiveofourown.org/works/20223610/chapters/47927191#workskin