By tutoring the children in the village of Petite Riviere and in the town of Port Louis, he managed to obtain a living. In 1837, he opened a private school in St. George street. It appears that this venture was not successful, for he soon accepted a position in a "boarding school conducted by Mr. Louis Barthelemy Raynaud, a white Mauritian Professor who did not scruple to teach the young generations of the white as well as of the colored population." When not engaged in tutoring at this school and the neighboring schools for young ladies, Ollier might be found devouring books on metaphysics, morals, criticism and politics. He was asked by several private institutions to give lessons in English, French and Geography; but while teaching others, he himself was studying with Mr. H. N. D. Beyts, who twice filled the post of officer administering the government. Ollier continued his work as a teacher until 1839. At the end of the school year, prizes were distributed, and he had the pleasure of presenting a prize to Miss Louis Sidonie Ferret whom he married in December, 1840. About a year before his marriage, he bought the school from Mr. Raynaud, with the idea of enlarging it according to his own plans; but this project failed for some unknown reason. He then undertook a trip to India, which seems to have been successful. On his return, he entered business, opening two large stores. His associate did not agree with him in his business plans and the business was dissolved by legal process. He then resumed his position as a teacher in the boarding schools. In 1841, he and his wife opened a school in the western suburb of Port Louis where the Negro population could bring their children for a liberal education upon the payment of a moderate fee. This helped him for a time to solve some of his financial problems but finally failed.