Diallo is the recipient of the 1998 Prentice Hall Publisher Award of Maryland, a three-time recipient of the African-American Harry Harden Jr Award which honors people of color, a four-time recipient of the Award of Excellence for Oustanding Contribution to the Academic Fields and the winner of the 2009 Business & Scientific Medal for the launch of his international publishing and its innovative digital publishing model.
- 2009 Senegalese Medal for Digital Innovation
- 1998 Prentice Hall Publishers Award of Maryland
- 1998, 1999 and 2000 Harry Harden Jr African-American Award
- 1998, 1999, 2000 and 2001 Excellence Award of Montgomery