Though Soman has an engineering diploma, he did not see himself making money out of it. Hence, he turned to modelling in 1988. Soman featured in Alisha Chinai's music video, "Made in India" (1995). In the mid-1990s after some time working as a model, he took the lead role in the Indian science fiction TV Series "Captain Vyom"
and also played part in "Sea Hawks (TV series)". He then focused on films starting in 2000. Soman's films include "16 December", "Pachaikili Muthucharam", "Paiyaa", "Agni Varsha" and "". In 2007 he appeared in "Bhram", "Say Salaam India" and "Bheja Fry". In 2009 he acted in Sachin Kundalkar's Marathi film "Gandha". He has also acted in a number of English language and other foreign language films and television series, including "Valley of Flowers" and "The Flag". In the Swedish film "Arn – The Knight Templar" he portrayed Saladin, the revered 12th-century Kurdish leader of the Arabs and Muslims. He was also seen in a character role in the 2016 Hindi film Bajirao Mastani.

Soman was the producer of the Hindi film "" (2003). He has also produced a children's television serial called "Ghost Bana Dost".

In 2010, he participated as a contestant in the hit reality TV show "". He came in fourth position.

On 20 May 2012 he became a Limca Record holder for running 1,500 km in 30 days for Greenathon, NDTV to spread environmental awareness. The same year the country's largest 'women's only' running event Pinkathon was set up under his guidance, to promote good health and breast cancer awareness amongst women.

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