While playing for Grasshoppers in Switzerland, 23-year-old Dieng was on the bench for a Champions League tie against Lille in 2014.
After a season in German football, he joined QPR in August 2017.
Dieng, of Senegalese descent, joined the Beavers` league rivals Whitehawk, initially on a month’s loan, in October 2017 but that was extended until January 1st.
And he scored for the Hawks with a header in the league game at Chippenham Town in December 2017.