[3] After graduating in 2012, Casimir completed a master's degree at Trinity Laban Conservatoire in 2015.
[2] He is an alumnus of Tomorrow's Warriors which he says "played a key part" in his career.
[4] Daniel Casimir has recorded and toured extensively in the band of saxophonist Nubya Garcia.
[5] He has performed also in the bands of Binker Golding,[6] Moses Boyd,[7] Camilla George,[8] Ashley Henry,[7][8] Makaya McCraven[5] and Lonnie Liston Smith,[5] amongst others.
As a composer, his "Balance" album is performed by the Dan Casimir Big Band, of leading figures of the new UK jazz scene, together with orchestral elements from the string section of the London Contemporary Orchestra.