Charles-Camille Saint-Saens (French: [SaRl kamij sesas]; 9 October 1835 - 16 December 1921) was a French composer, organist, conductor and pianist of the Romantic era. His best-known works include Introduction and Rondo Capriccioso (1863), the Second Piano Concerto (1868), the First Cello Concerto (1872), Danse macabre (1874), the opera Samson and Delilah (1877), the Third Violin Concerto (1880), the Third ("Organ") Symphony (1886) and The Carnival of the Animals (1886). Saint-Saens was a musical prodigy, making his concert debut at the age of ten.
Early career
On leaving the Conservatoire in 1853, Saint-Saens accepted the post of organist at the ancient Parisian church of Saint-Merri near the Hotel de Ville. The parish was substantial, with 26,000 parishioners; in a typical year there were more than two hundred weddings, the organist's fees from which, together with fees for funerals and his modest basic stipend, gave Saint-Saens a comfortable income. The organ, the work of Francois-Henri Clicquot, had been badly damaged in the aftermath of the French Revolution and imperfectly restored. The instrument was adequate for church services but not for the ambitious recitals that many high-profile Parisian churches offered. With enough spare time to pursue his career as a pianist and composer, Saint-Saens composed what became his opus 2, the Symphony in E (1853). This work, with military fanfares and augmented brass and percussion sections, caught the mood of the times in the wake of the popular rise to power of Napoleon III and the restoration of the French Empire. The work brought the composer another first prize from the Societe Sainte-Cecile.  Among the musicians who were quick to spot Saint-Saens's talent were the composers Gioachino Rossini, Hector Berlioz and Franz Liszt, and the influential singer Pauline Viardot, who all encouraged him in his career. In early 1858 Saint-Saens moved from Saint-Merri to the high-profile post of organist of La Madeleine, the official church of the Empire; Liszt heard him playing there and declared him the greatest organist in the world.  Although in later life he had a reputation for outspoken musical conservatism, in the 1850s Saint-Saens supported and promoted the most modern music of the day, including that of Liszt, Robert Schumann and Richard Wagner. Unlike many French composers of his own and the next generation, Saint-Saens, for all his enthusiasm for and knowledge of Wagner's operas, was not influenced by him in his own compositions. He commented, "I admire deeply the works of Richard Wagner in spite of their bizarre character. They are superior and powerful, and that is sufficient for me. But I am not, I have never been, and I shall never be of the Wagnerian religion."

Q: Where did he begin his early career?
A: On leaving the Conservatoire in 1853, Saint-Saens accepted the post of organist at the ancient Parisian church of Saint-Merri near the Hotel de Ville.

Q: How long did he hold that position?
A: unknown
What else did he do?
Although in later life he had a reputation for outspoken musical conservatism, in the 1850s Saint-Saens supported and promoted the most modern music of the day,
Although in later life he had a reputation for outspoken musical conservatism, in the 1850s Saint-Saens supported and promoted the most modern music of the day,