While studying western classical music privately, SANTHUSH was a member of the first Royal college Senior Brass Band. He played the alto saxophone and occasionally filled in for the percussion section. He was also a pianist with the western music society. He was a founding member and a lead vocalist of the school band. Winning many awards at inter-school competitions, Bathiya became a known figure in the school's music circuit as a college musician during the mid-90s. He later started learning music technology with the Sri Lankan music artist Dilup Gabadamudalige. He also joined the Marry Anne Singers Colombo. He studied opera, jazz, and Broadway singing under the Mary Anne David School of Vocal Music. During the late 90s, Bathiya worked as a freelance vocalist singing for radio jingles and commercials with Ranga Dassanayake. During this period, Bathiya Jayakody and Santhush Weeraman collaborated on a few projects, which led to the formation of BNS. Santhush Weeraman in coloboration with Bathiya and Umariya has featured in several Sri Lankan songs

With the collaboration with Santhush Weeraman, they have over 50 number-one hit singles, six platinum-selling mainstream albums, four commercially successful episodes, and countless movie soundtracks. BNS is one of the biggest musical acts to hit the Sri Lankan musical scene since the 1990s, mixing Sinhala, Tamil, and English rap verses in their originals. At the same time, they have also mixed Hindi rap verses in their folk hop remixes, bringing out their contemporary style and the music industry in Sri Lanka. BNS became the only Sri Lankan hip-hop act to feature Indian singers, namely Hariharan (in the song Yaalpanamen), Asha Bhosle (Dedunna Sedi), and Sonu Nigam (in the song Aachale). BNS Concert is also the only Sri Lankan artistes with albums under Sony BMG & Universal Music India. Having performed in over 2000 concerts in Sri Lanka and abroad, BnS Concert marked significant success with their concert tour series "Neththara Live" with 120 shows (2005-2008), "Shaheena Live" 40 concerts (2009-2011), "Sarasihina Live" 150 concerts (2011-2014), "BNS Up Close & Personal" 50 Concerts (2015-2018) and their latest concert series "Oba Nisa - Celebrating 20 Years of Music" which was launched in 2019. Starting from a musical duo from their home during their early days, BnS Concert Currently are the primary share holders of the Production Group, which houses some of the most successful companies in the Sri Lankan entertainment industry companies  Showtown Entertainment event management & production, Saregama Music Digital Audio Production, Saregama Films, Saregama Digital Content Acquisition & Management, and Leap Strategic Concepts.