Students of Seri Mulia Sarjana School have proven their excellent singing prowess as they emerged as the Champions in the Big 6 National Acapella Singing Competition held in Dewan Auditorium, Bangunan Tambahan Jabatan Penerangan Berakas on 1st May 2019  in conjunction with the 35th National Day Celebration organised by the Co-curriculum Department, Ministry of Education. The champion secondary team was comprised of six  students namely Aristotle Joshua T. Endaya (11D), Mohd Aiman Azzuddin @ Abd Rahman bin Hj Erwan (11B), Matthew Abel Filio (8D), Danial Muqei (8E), Wadi Iman Bin Haji Omar (7B), Danialla Adriana Boyd  (7F) as trained by Tr Garth Borerro and assisted by Teachers Elicer, Francis and Katrina.