 He remained as the company's musical director there and, from 1881, at the Savoy Theatre, until 1902, with a break between July 1880 and April 1881, when his brother temporarily resumed the position.The composer conducted at first nights, but Cellier, as musical director, was the principal conductor for the original runs of "Patience" (1881–82), "Iolanthe" (1882–84), "Princess Ida" (1884), "The Mikado" (1885–87), "Ruddigore" (1887), "The Yeomen of the Guard" (1888–89), "The Gondoliers" (1889–91), "Utopia, Limited" (1893–94) and "The Grand Duke" (1896).As the Savoy's musical director he conducted the London runs of fourteen operas by other authors or composers between 1891 and 1902, fourteen revivals of Gilbert and Sullivan works, beginning with "The Sorcerer" in 1884 and ending with "Iolanthe" in 1901, and a similar number of curtain-raisers and afterpieces.