John Luther Zimmerman IV (born November 26, 1973) is an American professional pair skater and coach.

[6] Initially, they were coached by Peter Burrows and Mary Lynn Gelderman in Monsey, New York, and they also commuted to Stamford, Connecticut, to work with Tamara Moskvina.

Zimmerman was featured as Yahoo's special guest expert correspondent for figure skating at the 2006 Winter Olympics in Turin.

Zimmerman worked as a coach at Panthers Ice Den in Coral Springs, Florida, with Silvia Fontana.

[9] He has coached Haven Denney / Brandon Frazier (from Autumn 2012 to February 2015 and since 2018 again)[8][10] and Vanessa James / Morgan Cipres (from June 2016).

[11] In December 2019, Zimmerman, Fontana, and fellow coach Vinny Dispenza, were accused in a United States Center for SafeSport investigation of covering up alleged sexual abuse committed by Ciprès via intimidation tactics.