He is best known for his roles in films like Jo Jeeta Wohi Sikandar (1992), Kya Kehna (2000), and television shows like Woh (1998), Ssshhhh...Koi Hai (2002), Vikraal Aur Gabraal (2003), Black (2009), Star One Horror Nights (2010), Who's Your Daddy (Season 2) (2020).

After completing graduation in commerce, he joined an advertising company (an ad agency) and started his modeling career.

[citation needed] Mamik made his acting debut in the film, Jo Jeeta Wohi Sikandar (1992) as Aamir Khan's elder brother Ratan.

Meanwhile, In 1997, he appeared in three more films, Aar Ya Paar, Dil Ke Jharokhe Mein, Koi Kisise Kum Nahin, along with the Kya Kehna (2000), directed by Kundan Shah.

In 2015, Mamik signed Pen Movies' Do Lafzon Ki Kahani, directed by Deepak Tijori that was released in 2016.