The teenager from Mizoram began his career with his home town Aizawl FC. A centre-back by trade, the teenager caught the eye in the U18 I-League held in Shillong in 2017. His brilliance at the back helped Aizawl put together an impressive run in the group stages. The side qualified for the final round on the back on three clean sheets. A composed player on the ball, Lalhmangaihsanga has good technique and all the attributes for him to be a modern day centre-back.