Is working as a financial analyst in an investment company that deals with all types of investment tools, including usurious ones, permissible, provided there is no direct participation in usurious transactions?

It is not permissible for you to work as a financial analyst because it assists a company that deals with usurious banks and investment entities that do not adhere to Sharia in their operations, which makes the company's activities forbidden. This work is considered aiding in sin and aggression, and Allah the Almighty says: (And cooperate in righteousness and piety, but do not cooperate in sin and aggression). Financial analysis is a fundamental pillar for the company, so you must leave this job and seek a permissible one from which you can earn a lawful livelihood, because a person will be questioned about their wealth on the Day of Judgment.