Dennis has been rapping since high school. He started out as Big-D then years later turned into Shif-D because he changed subjects in his rhymes so much he would shift from subject to subject. Then he joined a group called Unoticed. He released many mixtapes and his first album, Dirty Diesel. Then, many years later he released his 2nd album Slow Motion. He has done songs with artists such as; Eyeinsee, Nexus, Ajay, EP, Sprawl, DJ Homicide, B-Silent and many more. He currently uses his own recording equipment and produces all of his own material. He also makes hip hop/r&b beats. He is not signed to a label. His music is Hip-Hop. He writes and creates great music from the heart and soul.