The performing art of Constantin Sandu has developed under the influence of his Romanian masters – Sonia Ratescu, Constantin Nituand, later on, Constantin Ionescu-Vovuat the "Ciprian Porumbescu" Higher Music Conservatory of Bucharest – and of other outstanding individualities such as SequeiraCosta, Dimitri Bashkirov, Helena Sá e Costa and Tânia Achot. His uniqueartistic personality blends accuracyand respect for the musical text with fascinating poetical sensitivity and imaginative sound spectrum

At the age of 14, he started his career as a soloist with orchestra. Since then, he has been involved in an intense musical activity – hundreds of recitals, chamber music and concerts with orchestra – in several European and Asian countries, having had favourable appreciation from both the public and the critics: “his sensitive personality helps him give a very personal though valid version” (Piano Journal – United Kingdom); “a musician of an undoubted personality, (…) a magnificent sense of colour and rhythm, together with undeniable virtuosity” (Diariode Sevilla– Spain); “a superb pianist, (…) a masterful hue and delicacy (…) irreproachable mastery. Overwhelming.” (ABC – Spain); “an artistic performance of real excellence”(Muzica– Romania); “a concerto full of expression and emotion”(Público– Portugal); "A General leading his troops, the Bodensee Symphonic Orchestra." (L' Est Républicain– France); “The delicate and deep playing, the almost immaterial sound,carried the audience into a dimension of dream.” (Corriere Valsesiano– Italy).

He holds several awards at international competitions: Senigallia – Italy 1980 (2nd), Viotti-Valsesia – Italy 1981 (1st), PalomaO’Shea– Santander, Spain1984 (Honourable mention), Epinal – France 1985 (2nd) and Maria Canals– Barcelona, Spain1985 (3rdand Alberto Mozattispecial prize).

He has participated in important Festivals, namely: Enescu– Bucharest, Chopin– Paris, Festival Internacionalde Santander, Festival de Primavera- Sevilla, Ciudad de Ayamonte, Internationale Trossinger Tastentage, Muziksev- Izmir, Figueira da Foz, Espinho, Guimarães.

He is a regular guest soloist of the most significantRomanian orchestras, such as: George Enescu – Bucharest, Transilvania– Cluj, Oltenia– Craiova Philharmonics, and the Symphonic Orchestra of the Romanian Broadcasting. He has also played with noteworthy European orchestras, as for instance: Arthur Rubinstein– Lodz, Halle Philharmonic, BodenseeOrchestra – Konstanz, National Orchestra of Belarus, Symphonic Orchestra of Radio– television of Kiev, National Philharmonic of Moldavia, National Orchestra of Porto.

He has played with renowned conductors, such as: Cristian Mandeal, Horia Andreescu, Ludovic Bacs, Emanuel Elenescu, Christian Badea, Camil Marinescu, Daisuke Soga, Ilya Stupel, Thomas Koncz, Victor Dubrovski, Emil Hatchaturian, Elena Herrera, Meir Minsky, Mark Stephenson, HeribertBeissel, Johen Wehner, Robert E. Luther and Didier Benettiand Piero Bellugi, Roberto Salvalaio.

He has performed in celebrated concert halls (AteneulRoman– Bucharest, Concert Hall of the Romanian Broadcasting Society-Bucharest, Palau de la Música Catalana– Barcelona, Iturbi hall of the Palau de la Música– Valencia, Manuel de FallaAuditorium – Granada, Mozart hall of the Zaragoza Auditorium, Teatrode Rojas– Toledo, TeatroCervantes– Malaga, Calouste GulbenkianFoundation - Lisbon, Casa da Música– Porto) and in other important musical centres (London, Paris, Berlin, Hamburg, Rome, Turin, Madrid, Seville, Bratislava, etc.).

He was a member of the jury of the following International Competitions: Épinal, France 2015, Vianna daMotta— Lisbon, Portugal 2001, Cidade do Porto— Portugal 1996, 1998, 2003 and 2010, Viotti-Valsesia— Italy 1995, Pinerollo-Cittá della cavalleria— Italy 1994 and 1996, Helena Sá e Costa— Aveiro, Portugal 2004, Florinda Santos— São João de Madeira, Portugal 2004,2012,  Ciudad de Toledo – Spain 2007 and Propiano– Bucharest, Romania 2008 - 20132015, Paços’ Premium 2009, 2011, 2013 

He has given several master classes, among which the following  are to be mentioned: Porto International Music Courses1998, Celebrating the Great PianistsFestival in Aveiro2001,International Music Courses Ciudad de Gandia2003,National Music University of Bucharest 2005, 2013, International Music Forum of Torrelodones2008, Encuentros Internacionalesde Música - Alcobendas 2012, Hochschule fϋr Musik Trossingen2012, Maastricht Conservatory 2013, Fórum Internacionalde Música"Ciudad de Orihuela" 2013, 2014and 2015, YasarUniversity - Izmir 2014, National Music Conservatory of Lisbon 2008 and several editions of the International Instrumental Courses of ARTAVE/Centro de CulturaMusical.

Within Porto 2001 — European Capital of Culture, he performed RachmaninovPiano Concerto No. 2 with the Porto National Orchestra, under the direction of Mark Tardue. This performance was integrated in an all-Rachmaninov-Concertos programme, in which he participated together with Vladimir Viardo, SequeiraCosta e Artur Pizarro.

He recorded several CDs – Beethoven (2001), Albeniz and Gershwin (2002), Portuguese and Romanian piano music (2005), Mozart and A. J. Fernandes Concertos (2009) and other collective or chamber music works.

In 2006, he received the title of Ph. D. in music at the National Music University of Bucharest, with the thesis Portuguese Piano Music.

He has lived in Portugal since 1991 and presentlyteaches the piano at the Porto Higher School of Music and the Performing Arts,where heis the current Head of The Piano Department.