What is the ruling on working as an accountant in a brokerage and stock trading company (shares) that takes a sales commission from its clients in exchange for their dealings through it on the Egyptian stock exchange?

There is no objection to working for a brokerage firm in the stock market for a commission, provided that it does not broker transactions involving prohibited stocks. For dealing in stocks to be permissible, the company's activity must be lawful, and it must not deposit a portion of the shareholders' money in usurious banks to earn interest. One must inquire about the true nature of the company's and the stock market's dealings and their financial system.