James Gregory Scheffer (born June 8, 1970), known professionally as Jim Jonsin, is an American record producer and songwriter 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.

[10] Jonsin signed other acts to the label including singer Leroy Sanchez, as well as fellow producers FnZ,[11] Danny Morris, and Frank Romano.

[18] Soon after the success of this song, Jonsin began working with Miami native Pitbull and produced his 2004 single "Dammit Man"[19] from the rapper's debut album M.I.A.M.I., which received gold certification by the RIAA.

[23] Jonsin saw his furthest success for his production on Lil Wayne's 2008 single "Lollipop", which peaked the Billboard Hot 100, received diamond certification by the RIAA, and won a Grammy Award for Best Rap Song.

[34][35] Shortly after its release, Jonsin reunited with Pitbull to produce his 2009 single "Hotel Room Service", which received platinum certification and peaked at number eight on Billboard Hot 100.

[38][39] Released that August, Jonsin wrote and produced American Idol winner Fantasia's single "Falling In Love Tonight", from her Grammy Award-nominated album Back To Me.

[40][41] In early 2011, Nelly released the single "Gone" (featuring Kelly Rowland), which was also co-produced by Jonsin in tandem with singer Rico Love.

[13][44][45] The Jonsin-produced single "On My Level" (featuring Too Short) was released by Wiz Khalifa on his major label debut, Rolling Papers on March 29, 2011.

[47] B.o.B's 2009 debut single, "Nothin' on You" (featuring Bruno Mars), peaked atop the Billboard Hot 100 and received three Grammy Award nominations.

Writers signed to Rebel Made's roster include Terence Reid, formerly of The Network, along with fellow producers Finatik and Zac and Danny Morris.

The race team is supported by its ambassadors, Pitbull, Kyle Loza, and Yelawolf and sponsors such as Beats by Dre and Oakley.

[70] Jonsin has cited DJ Jazzy Jeff and Jam Master Jay as strong musical influences on his style and has been known to use an MPC 3000, a Roland TR 808, and an Access Virus TI as his preferred gear.

[75] Jonsin went on to tour with some of the most popular acts of the time such as Cypress Hill, 2 Live Crew, and Marky Mark and the Funky Bunch.