[1] His most famous serials are Peythozhiyathe, Venal mazha, Swapnam, Avicharitham, Amma Manassu, Kudumbayogam, Orma, Mazhayariyathe, Kadhayile Rajakumari, Oru Penninte Kadha and Eshwaran Sakshiyayi.
[2][3] In 2009, Rajeev produced a TV serial based on the late writer and director Padmarajan's famous work Vadakaku oru Hridayam.
The script for the serial has been written by Padmarajan's son Ananthapadmanaphan.In his career as a film director, he won many awards which includes the state award he won for directing Avicharitam telecasted in Asianet.His debut film in Malayalam cinema is Njanum Ente Familiyum starring Jayaram, Mamta Mohandas, Mythili, Manoj K. Jayan, Jagathy Sreekumar and Nedumudi Venu, which released in 2012.
During his school and college days he was very active in pursuing his hobbies of acting in and directing plays of well-known writers.
When he was an undergraduate commerce student in M S M College, Kayamkulam, his team took part in the Kerala University Youth festival drama competition and KK Rajeev won the 'Best Actor of the Year' award.