BJ “SOBAONE” Johnson began tattooing in 1997.  By 1999 he had already begun figuring out how to manufacture, from scratch, his own tattoo machine models.  In 2002 he began working with Seth Ciferri, Adam Ciferri and Aaron Cain to co-found Workhorse Irons. BJ now builds machines and makes tattoos in his private studio GreenLion Studios located in Grand Rapids Michigan.