Külli kiivet graduated from the Estonian Academy of Music and Theatre in 2006 majoring in musical education and Tallinn Georg Ots Music High School in 2001 majoring in classical singing. Since 2008 she works at Tallinn Music High School, teaching singing and voice placing. She is also the Chief Conductor and Artistic Director of the “Estonian National Girls’ Choir LEELO” since 2013 and Mentor at the Estonian Choral Association.

During 2004-2010 and 2015-2017, she worked at Children Music Studio by Estonian Television and was the Chief Conductor of the “ETV Youth Choir” and “ETV Concert Choir”. During 2012-2015 she was Conductor of the Chamber Choir “Head Ööd, Vend“ and during 2013-2015 she was Conductor and Vocal Coach of the “Tallinn Music High School Boys’ Choir”.

As a singer, she has participated in several operas, musicals and magna opera as well as in choir contests in Estonia and abroad. She participates often as juror in different song contests in Estonia and has been a guest conductor on County Song Festivals. As a singing teacher she has been awarded in National and International Song Contests.  

Külli Kiivet was girl`s choirs conductor in 12th Estonian Youth Song and Dance Festival in 2017 and female choirs conductor in 27th jubilee Estonian Song and Dance Festival in July 2019 in Tallinn.
She has awarded the Estonian Choir Union Annual Awards – "Young Conductor of the Year 2009" and „Conductor of the Year 2017“.

Mary Konstantinidou was born in Thessaloniki, graduated from the State Music School of Thessaloniki in piano and choral conducting, and has continued her studies with Peter Erdei (Hungary), Dimitris Agrafiotis (Grecce) and Titner (Great Britain).

She has conducted Mixed Choir of Thessaloniki since its establishment and has led them to win one gold, two silver, and three bronze medals at international competitions of Athens, Rome and Langollen.

She has collaborated with the National Opera of Greece, Greek Festival, National Theater of Northern Greece, Opera of Thessaloniki, Athens State Orchestra, ERT National Symphony Orchestra, as well as with Thessaloniki Concert Hall, Athens Concert Hall in more than 24 opera productions and 50 oratorios and has appeared in chamber concerts in America and Canada.

She has conducted the choirs Thermaikos, North College, Anatolia Alumni, and many more. She has also conducted in Budapest, Stockholm, Salzburg, Venice, Vienna, Istanbul, Rome, Saint Petersburg, and many more cities as well.

Lucien Posman is honorary professor of composition and music theory at the Royal Conservatory of the University College Ghent in Belgium. He is the founder and honorary chairman of "ComAV", the Flanders Composers Archipelago, an interest association. Posman is member of The Royal Academy of Belgium for Science and the Arts. As bass singer he was and still is member of several choirs among them "Aquarius Choir". He studied music theory, composition and singing at the conservatories of Ghent and Antwerp. His works comprise a symphony, an opera, concertos for piano and for violine, a concerto for clarinet & choir and piano, chamber music for various ensembles and a relatively large number of vocal works, mostly using texts by William Blake. As composer he is a representative of postmodernism. His work is performed and broadcasted by prominent musicians and ensembles at home and in many European countries, Brazil and Russia. A number of his works have been awarded composition prizes.

Prof. Ren studied under the supervision of the conductor and music educator Prof. Geshun Ma, and started his own career in choral arts and teaching in 1983. By adding decades of practical achievements into Chinese choral realm, with the aid of innovation, he created the distinctive choir “Peiyang Acoustics”.

Prof. Ren is regularly invited to give lectures in more than 30 provinces and cities in China and many young conductors and composers are nurtured by Prof. Ren, like Yong Mao, Yuchuan Wen, Wenhao Mou, Jinming Zhu, Can Zheng, Wei Cui.

Throughout the years, he has set up Choral Appreciation, Chorus and Conduct and other courses at the Tianjin University. Apart from that, he advocates for holding Chinese Chorus Conductor Masterclasses, the pedagogic achievements of which won the Chinese government's rewards. Prof. Ren also shouldered the responsibility successively to be the Art Director of more than 20 choirs and is guest professor at a large number of universities.

Prof. Baoping Ren is Vice Director-General of the China Choral Association and of the China higher-education academy musical education major committee, Chairman of China higher-education choral committee, Vice Director of the China Choral Association University Choral Committee, Artistic Director and Chief Conductor of Peiyang Chorus and is regularly invited as a judge for international choir competitions.

Sergei Yekimov is a professor of the Herzen State Pedagogical University, head of choir faculty of arts and artistic director of the concert chorus at the St. Petersburg State Institute of Culture, associate professor of choral conducting and female choir director at the Rimsky-Korsakov St. Petersburg State Conservatory, member of the Union of Composers of Russia and the Union of Concert Figures, artistic director of the International Festival of Choral Art held in St. Petersburg, the "Singing World", winner of international competitions, and winner of the government award of St. Petersburg in the field of culture and art.

Choral compositions of S. Yekimov are standard repertoire of leading Russian and international choirs. His compositions are featured in CDs, radio, television internationally. They have been performed in a myriad of cities in Russia, Armenia, Latvia, Poland, Austria, Germany, Japan, the USA and many more.