Jim Jonsin

James Gregory Scheffer (born June 8, 1970), known professionally as Jim Jonsin, is an American record producer from South Florida. He has produced for numerous musical artists, including Beyoncé, Kelly Rowland, Usher, Lil Wayne, Kid Cudi, Eminem, Pitbull, Yelawolf, Nelly, Mary J. Blige, Wiz Khalifa, Danity Kane and Jamie Foxx, among others. He won a Grammy Award for his work on Lil Wayne's 2008 single "Lollipop," and received a nomination for Best Rap Album for his work on "Whatever You Like" by T.I. that same year. Furthermore, both songs peaked the Billboard Hot 100.

Jonsin's productions have been on other Grammy Award-winning albums such as Beyoncé's I Am... Sasha Fierce (2010 Best Contemporary R&B album), Lil Wayne's Tha Carter III (2008 Best Rap Album), Usher's Raymond v. Raymond (2011 Best Contemporary R&B album), and Usher's "There Goes My Baby" (2011 Best Male R&B Vocal Performance), and Eminem's Recovery (2011 Best Rap Album and Album of the Year).

Jonsin launched the record label Rebel Rock Entertainment in 2006, through which he signed then-unknown rapper B.o.B that same year. Jonsin's label partnered with Atlantic Records and later T.I.'s Grand Hustle Records to release B.o.B.'s debut album, The Adventures of Bobby Ray (2010). The album debuted atop the Billboard 200, and was followed by Strange Clouds (2012) and Underground Luxury (2013). Jonsin signed other acts to the label including singer Leroy Sanchez, as well as fellow producers FnZ, Danny Morris, and Frank Romano.

Outside of music, he entered into the field of professional racing in February 2012 and formed his own motorsports team, Rebel Rock Racing. Jonsin drove a Porsche 911 in the Grand-am Road Racing series with co-driver D.J. Randall that same year.