Cosmas Sebastian Atmadja (born 1991, in Surabaya – Indonesia) began his piano studies at the age of 3 from his mother Russy Sutanto. He Subsequently learned from Rukian Sutanto and So Kim Hwie, and then pursued further studies under guidance of Wei Tsin Fu (Germany) and Elizabeth Powell (former Heard of Sydney Conservatorium Keyboard Department).
Cosmas has been awarded his AMusA and LMusA from the Australian Music Examinations Board (AMEB). As a pianist, he has earned a remarkable achievement including Theme and Variation and Steinway and Sons Scholarship, The most Outstanding Pianist Award, and the Museum Record of Indonesia (MURI) as the youngest pianist who played a piano concerto with an orchestra.
Cosmas also has significant experience as a performer such as performing Grieg Piano Concerto and Mozart Piano Concerto with Surabaya Symphony Orchestra, Carnival des Animaux and Carmina Burana with Jakarta Concert Orchestra and Fantasy of Indonesia Pusaka with Nusantara Symphony Orchestra, which he played in the presence of the fourth President of Republic of Indonesia, Megawati Soekarno Putri. In 2007 he Performed Liszt’s Totentanz with Seraphim Orchestra under baton of German Conductor, Mr. Moritz Gnann. He has also been invited to Asia, Europe, and Australia for a tour concert in 2006.
He was invited to give a recital in Lake Macquarie and to participate in winners’ concert of Ryde Eisteddfod in Sydney, Australia in 2013. He also performed with Jakarta Philharmonic Orchestra in the event sponsored by Jakarta Governance in the following year and Yellow River Piano Concerto in the Chinese New Year Celebration attended by the Consulate of Republic of China. Cosmas graduated from University of New South Wales with Bachelor of Commerce degree in Finance and Information System.


Born in Surabaya – Indonesia, Kevin Georgius Atmadja started learning violin at the age of thirteen under guidance of Mr. Paul Situpang. He then learned conducting under Mr. Jason Lai, Principal of the Yong Siew Toh conservatory of Music – Singapore in 2012 -2013. 
Some of his achievements include obtaining highest distinction in 8th grade ABRSM examination, performing in the Indonesian Capital Palace with Gita Bahana Nusantara Orchestra, taking parts in Bandung Philharmonic Orchestra conducting fellowship by Robert Nordling (USA) and Amadeus Symphony Orchestra by Prof. Robert Lehrbaumer (Austria), accepted as the only Indonesian active participant in International Conducting Masterclass by Jahja Ling with Jakarta Simfonia Orchestra, invited as Guest Conductor to lead Jakarta City Philharmonic in 2019 and 2020, as well as representing Indonesia to perform in Asia Orchestra Week 2005 in Tokyo and Osaka, Japan with Nusantara Symphony Orchestra under Japanese Conductor, Mr.  Hikotaro Yazaki.



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