The founder and the artistic leader of the Haapsalu Early Music Festival is the musicologist and conductor Toomas Siitan. Since 1997 the festival has been organized by the concert agency Concerto Grosso and it`s director Egmont Välja. The Festival is taking place thanks to Haapsalu City Government, Haapsalu St John`s Congregation, Estonian Ministry of Culture, Cultural Endowment of Estonia, foreign embassies and sponsors.

Toomas Siitan (1958) graduated from the Estonian Academy of Music (Tallinn State Conservatoire) in 1981 as a composer, but since then has mostly been occupied as a musicologist. From 1986 onwards he has been teaching music history at the Estonian Academy of Music, journals of many European countries have published his articles. He is active as a board member of The Estonian Musicological Society and of International Fellowship for Research in Hymnology. Since 1994 under his leadership the Haapsalu Early Music Festival is held every first week of July.

In the years 1976–1988 Toomas Siitan was singing in the Estonian Philharmonic Chamber Choir. During last ten years he has been conducting various groups, like the Estonian Radio Choir (1993), the chamber choir Arsis (1994), the Chamber Choir of Estonian Choral Society (1995), the Estonian Philharmonic Chamber Choir (1997/98), the Estonian National Male Choir (1996–98), the Haapsalu Festival Choir and Tallinn Baroque Orchestra (1995, 1997, 1998), international choir Vox Europae (1998). In the year 1994 he founded the vocal ensemble Studio Vocale.