Sujatha was a prolific writer of popular fiction in Tamil. His writing career spanned almost 50 years from the 1960s to 2008. He wrote thrillers, science fiction, psychological thrillers, film scripts, and articles based on science, technology, and neurosciences. Kakitha Changiligal, Ullam Thuranthavan, Pesum Bommaikal , and Nillungal Rajave are some of his popular works. Many of his novels and short stories have been made into films and also adapted for television. He was an electronic engineer and retired as General Manager, Bharat Electronics, Bangalore. He was conferred the “Vaswik” award for his contribution towards the electronic voting machine by the Tamil Nadu government.