recommend someone as something
to suggest someone as something. Could you recommend Frank as a good carpenter? I can recommend Jane Smith as a good artist.
recommend someone for something
to suggest someone for something. I would be very glad to recommend you for promotion. She recommended herself as the best choice.
recommend someone or something to someone
to suggest that someone choose someone or something. I would like to recommend Sally to you as a good prospect for membership on the committee. Could you recommend a good mechanic to me?