Q 2: Is it permissible
to work for Islamic banks and Islamic investment companies?
Are the salaries from these places Halal (lawful)?
There is no objection to working for these banks, as long as they do not deal with Riba (usury/interest). There is also no objection to working for investment companies, if they do not invest money in things prohibited by Allah. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.