Dennis Camilleri entered the world of music at the age of eleven. In 1994, he graduated for the first time from the London College where he acquired his LLCM in baritone performance. Two years later, Dennis achieved the FLCM from the same college. In 1997, he graduated from the Trinity College, obtaining the FTCL.

He attended various masterclasses under the guidance of international artists. In 2005, he achieved his fourth recognition by graduating from the Royal School of Music and achieving the LRSM, this time in trombone performance.

Over the years, Dennis gained knowledge and experience by trying out hundreds of different mouthpieces, which, together with Gilbert, brought about the creation of a masterpiece, the K&G Mouthpiece.