Born in Athens, Greece, Kyriakos Moustakas has been acquainted to music from an early age – at 6 he started piano lessons and music theory, by 15 he was already incorporating electronic sounds and synthesizers in his first compositions-. His passion for music and the pursuit of his artistic development led him on a dedicated path towards production and sound engineering.

In 1998, Kyriakos joined the Los Angeles-based recording company, m-beat, as their Lead Producer. Under the name Sundayman, Kyriakos produces his first work through m-beat, while also contributing tracks to U.S. label Water Music’s compilations as well as releasing several maxi singles in Greece through companies such as Sony Music and Minos EMI. As Sundayman, he has released two albums with a third one being scheduled for 2016.

In 2001, he founded Inhousemusic, a company specializing in the creation and production of bespoke music for television & radio spots. Through Inhousemusic, Kyriakos worked with almost every advertising agency in Greece, composing and producing music for more than 400 TV spots.

His roster of television music productions, includes work for international brands such as VW, Audi, Toyota, Coca Cola, Jacobs, Nestle, Citibank, Johnson & Johnson, MTN, Vodafone and Sony Ericsson.

In 2015, Kyriakos and Stratos  Diamantis, merge their respective companies into one, creating Rabbeats Music. A new music company, offering exceptional music of all genres, for television commercials, radio spots and movie scores.