He is on the books of Young Elephants and wears shirt number 13. At international level, he features for Laos U19. His main role on the pitch is Midfield.

His latest transfer saw him join Khammouan Army from Free player via on 2024-06-30.

Over 2 appearances in the AFF U23Youth Championship 2023, Thanouthong·Kietnalonglop contributed 0 goals and 0 assists, completed 0 key passes from 0 total passes, and posted a passing accuracy of -.