Johannes Sikemeijer, known as Joh. H. Sikemeier, was a Dutch pianist and, above all, piano teacher. He was born in Amsterdam on 16 June 1838, the son of Johan Heinrich Sikemeijer, a coffeehouse proprietor from Osnabrück, and Geertruida Jansen, who taught piano at 85 Kalverstraat.
From 1853 to 1857, supported financially by relatives and friends of music, he studied at the Royal Conservatory of Brussels with Léopold Godineau. He won a first prize in 1855 and undertook concert and artistic tours while still a student.
In 1857 Sikemeijer returned to the Netherlands and settled in Rotterdam. He continued to travel, while from the 1866–1867 season he taught piano at the music school of the Society for the Promotion of Music, where Woldemar Bargiel was active. He marked his 25th anniversary as an artist in 1882 and became the school's director from the 1895–1896 season.
Committed to Rotterdam, Sikemeijer declined offers from conservatories in Geneva in 1873 and Amsterdam in 1877. His motto was “Many are called, few are chosen.” In 1906 he was appointed a Knight of the Order of Orange-Nassau in recognition of his work.
He married Catharina Christina de Jong, who died in 1906. Their foster son, Piet de Waardt, was his pupil and later became a pianist. Sikemeijer spent his final years with De Waardt at 17 Kleine Hout Street in Haarlem, where he died on 16 January 1920. He was buried at Crooswijk General Cemetery in Rotterdam; a memorial designed by the sculptor Simon Miedema, consisting of an obelisk with a medallion portrait, was unveiled at his grave in June 1921.