Headhunterz started as a duo under the name of Nasty D-Tuners, though they were contracted as Headhunterz by The Prophet’s Scantraxx label. Bobby (Deej-010) stopped temporarily with DJ’ing and producing, so he could finish his study. But afterwards, Bobby decided to continue in other styles of music. Willem continued as Headhunterz alone. Headhunterz started his own sublabel called Scantraxx Reloaded. Later he started HARDwithSTYLE. Headhunterz is considered by many to be one of the biggest hardstyle acts there is. He produced multiple anthems for events like Defqon.1 and Qlimax, and created the biggest hardstyle hit (No.1 Hardstyle Top 2000 in 2015 and 2016) “Tonight”, with Noisecontrollers and Wildstylez.
At the end of 2014, Headhunterz left his hardstyle focus and decided to move into more big room sounds, signing with Ultra Music. He has since been producing EDM. A lot of people are hoping for his return to hardstyle, and this is being teased by himself and Q-Dance already. In 2016 he performed (as Project One) at Qlimax, and at Defqon.1 as one of the Defqon.1 Legends.
In 2017, At Defqon.1 (again), he announced his return to hardstyle, and took part in another Legends formation, together with Noisecontrollers, Wildstylez, Alpha2, Brennan Heart and Psyko Punkz.