"Any hate speech, and within that any expression of antisemitism, is in violation of our code of conduct and against everything that Islamic Relief stands for," it said.
The charity did not name former network and resource development director, Mr Abdoun, in its official statement but confirmed his identity to news website Third Sector.
An independent commission, chaired by former attorney general Dominic Grieve, will review the organisation’s trustee and director vetting process and examine its code of conduct. It is expected to release its findings early next year.
Senior leadership will receive antisemitism awareness training, the charity said.
The company has faced similar issues over recent months, with the departure of several senior figures over allegedly antisemitic posts.
