The right defender is a former member of the Black Satellites. He played with the team at 2009 African Youth Championship in Rwanda. The team emerged the winner at that tournament Inkoom played his first game for the senior side, the Black Stars, on 20 November 2008 against Tunisia. He received his first start for Ghana in the World Cup qualifier against Benin on 28 March, which Ghana won 1–0. Inkoom, formerly, was a member of the Black Starlets. He was in the extended squad for the 2005 FIFA U-17 World Championship in Peru. He was not nominated for the tournament squad. After that competition, Inkoom aided Ghana in winning the 2009 FIFA U-20 World Cup by holding Brazil to a 0–0 score over 120 minutes, and then, when the game went to a penalty shootout, took the second spot-kick for Ghana and scored, giving Ghana the victory.