Manoj Krishnan was a singer famous for singing on Doordarshan TV. Manoj went to Chittoor Government College. He took his MA Degree from this college in music. He was associated with the Mathrubhumi Study Circle. He started his musical profession from Mathrubhumi Study Circle. In 1999, he released his first album. It was called Swami Sangeetham 2. He released this album along with K.G. Marcose on 18 August 1999. It included songs like Haritha Kaanana, Hariyum Haranum, Kumbhodaranu, etc.
His second album was Nadodi Nrithaganagal Vol 2, released along with Madhu Perattupuram and various other artists. It was released on 24 August 2004, under the label of M.C. Audios & Videos. The album included songs like Chathiyan Chanthu, Dussala, Kaanana Kanyakamaar, etc. Another 2004 release was Ponnambalam 1 with Suma Suresh. In 2005, Sree Mookambika Theertham came in which Manoj worked along with Manjeswar, dated 10 June 2005. Songs like Akshara Maala, Devi Devaambike, Engine Njaan, etc, are on this album.
Manoj worked with M.G. Anil on his next album Narayana Mandram released on 3 March 2006. It had songs like Om Krishna Janardhana, Om Krishna Remapathe, etc. Swamikkoru Kanikka was released on 10 November 2007. He worked with Arun and
Vidhu Prathap for this project. Songs included in this album were Ayya Ninney, Gakamughapathi, Himakanamurugum, etc. Kulakkaattamma was released on 11 August 2008 featuring Sajeev Raman. Kailasam Valamvaykkum, Animeyyil, kulakkattoru Kaavunde, etc, were the songs on this album.
Kripa Karo Bhagwan was another album released on 23 April 2010. It was his solo album with hit songs like Leke Shiv Ka Naam, Jai Gaanpati, Jai Govinda Jai, etc. After five years time, his last album was released on 14 November 2015. He worked with the world renowned artist Hariharan on this album. Vandeham Pamba, Pambe Ennum, Swami Kattil, etc, songs became very famous through this album. Along with albums, Manoj has also sung in Malayalam movies. More than 25 songs are under his name. He sang in movies like Sopanam, Subhadram, Mohitham, Thirakalkkapuram, and Manthrikochamma.
Manoj has also tried his hand in background scoring and music direction. He has given music and background score for over 30 films. He has also worked in Tamil movies. He has sung various devotional songs. Also, he has presented in various visual channels in Malayalam and Tamil television. Manoj Krishnan died on 4 May 2016. He was suffering from liver cirrhosis. His treatment for cancer was going on in PVS Memorial Hospital, Kochi.