Arun K Alexander started his film career by graduating in Diploma in Cinematography Technology (DCT) by Government Film and Television Institute (GFTI), Bengaluru. He worked as an Assistant Cinematographer under ace Cinematographers like B.Rakesh, Chandra Shekhar and Shekhar Chandru and other fellow cinematographers for films like Moodaayana, Gultoo, Asthithwa, First Rank Raju, Chauka, Dhairyam, Raju Kannada Medium. His 2019 release includes Night Out.