Is it permissible to mediate between two companies to complete a project, where one is the contracting party and the other is the executing party, with the knowledge of the first that the second will be the one to execute the project, and when is mediation considered unlawful?

It is permissible to charge a fee for mediation between a project owner and a contractor, based on what the jurists have mentioned regarding the work of a broker (simsar or dallal), who mediates between a seller and a buyer to finalize a sale. A condition for the permissibility of mediation is that the mediated work must be permissible.