He is on the books of Alianza FC San Salvador Women and wears shirt number 4. At international level, he features for El Salvador Women. His main role on the pitch is Defender.

Across the CNCF WCC 2025-2026, L. Guillén appeared in 4 matches and averaged 1.8 tackles, 0.8 interceptions, 3.3 clearances, and 0.3 blocked shots per game.