Born on June 30, 1887, in the estate of Sergievskoe, located in the Kaluga province. He was the son of a governor who later became Archpriest Mikhail Osorgin. In childhood, the boy served in the altar of the village church of the Protection of the Mother of God, read in church, and sang in the choir. In 1910, he graduated from the law faculty of Moscow University. He participated in the war, after which he emigrated to Constantinople and then moved to Baden-Baden, Germany. There he served as a psalmist and choirmaster in the Orthodox church.

In 1924, at the suggestion of Metropolitan Evlogy, he moved to Paris and began organizing a new Holy-Sergius Orthodox parish on Crimea Street. He became a member of the founding committee of the Holy-Sergius representation, and the consecration of the main altar of the church took place on March 1, 1925. In May of the same year, the Holy-Sergius representation and the Holy-Sergius Theological Institute were established on the parish grounds. M. M. Osorgin managed the Representation and taught practical liturgy and church law at the Institute from 1930 to 1947. He founded courses for psalmists and published a brief outline of the order of church services. He was also a psalmist and choirmaster of the Holy-Sergius representation.

Together with Bishop Benjamin (Fedchenkoff), he introduced a style of singing at the Representation that corresponded to monastic regulations. Osorgin was a devoted supporter of ancient Russian church chants and completed a number of their arrangements. To raise funds for the church's establishment, the church choir under his direction gave concerts that featured both traditional hymns and his own arrangements, as well as arrangements by A. K. Glazunov, N. N. Cherepnin, A. T. Grechaninov, and other composers.

He passed away on October 16/29, 1950, and was buried at the cemetery of Sainte-Geneviève-des-Bois near Paris.