Lalhmangaihkima signed his first senior contract with Aizawl in 2018. He was included in the squad for the 2018–19 I-League season.[2]
Lalhmangaihkima made his debut for the club, on 25 February 2019, against East Bengal, by coming on as a substitute for captain Alfred Jaryan in the 84th-minute of the game, which ended in a 1-1 draw.[3][4] He only made just two appearances for the club in the 2018–19 I-League season.
Lalhmangaihkima continued to play for Aizawl for the 2019–20 I-League season. He played his first game of the season against TRAU FC on 11 February 2019 as a substitute which they won 2–0.[5] Lalhmangaihkima played against Chennai City FC as a substitute which ended up in a 1–1 draw.[6] Lalhmangaihkima played his third match of the season for Aizawl against Chennai City FC in the return leg on 17 December 2019 which ended in a goalless draw.[7] Lalhmangaihkima was consecutively used as a substitute for a streak of 5 matches until he makes it to the starting lineup against the Kolkata Giants, Mohun Bagan on 30 November 2019 which ended 0-0.[8] Lalhmangaihkima lost his first game with Aizawl against NEROCA F.C. on 6 December 2019.[9] Lalhmangaihkima was benched for the next match against Indian Arrows on 9 December 2019.[10] He made his second breakthrough to the starting lineup against Real Kashmir on 29 February 2020 which was drawn 2-2.[11] Lalhmangaihkima started for next match against Mohun Bagan on 10 March 2020 in the return leg of the season which ended up 1–0 in favour of Mohun Bagan.[12] Lalhmangaihkima played his last game of the season on 7 February 2020 against East Bengal by coming onto to the game during the injury time. The match ended up 1–0 in favour of Aizawl.[13] Lalhmangaihkima made nine appearances for the club in the 2019-20 I-League season.
Lalhmangaihkima played his only match of the 2020-21 I-League season against Chennai City FC as a substitute for Alfred Jaryan on 20 March 2021, which they won 1–3.[14]
On 3 September 2021, he signed a contract extension with the club along with eight other players, ahead of the 2021–22 I-League season.[15]