At the international level, he represents Greece U21. He plays primarily as a Defender. His current market value is estimated at 250K €.

His most recent move was a from Olympiacos Piraeus to Olympiakos Piraeus B on 2025-07-01.

Throughout the Greek Cup 2024-2025, Athanasios Koutsogoulas featured in 3 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.