Is it permissible to work in a resource development position for fundraising in a trust company that operates an endowment from an Islamic bank, whose main activity is dedicated to providing interest-free loans (Qard Hasan) or loans without interest to eligible Muslim students, and is the salary received from this bank permissible (halal)?

It is permissible to work in resource development for fundraising in a trust company if the trust (loan) is a good loan (Qard Hasan (definition)) without interest, because it falls under cooperation in righteousness and piety. So, if the company lends students a good loan without interest, there is no harm in fundraising for this purpose. There is also no harm in depositing money in an Islamic bank, or in a current account at a conventional bank when an Islamic bank is not available, unless there is a fear of losing the money and no way to preserve it except by depositing it in a conventional bank without interest. In this case, it is permissible to do so as it involves committing the lesser of two prohibitions.