Assalam-o-Alaikum,

My question is that whether the job of a Finanance Manager is justifiable in Islam or not while as we know that his main job description is to manage the finances of the company, to negotiate with different banks for loans on cheap interest rates, to deposit surplus funds of companies in banks to earn interest income and to make decisions whether to borrow money or issue further shares etc.
Please also give me references. I'll be grateful to you for this favour.