Sheridan, a 53-year-old Detroit native, joins the Buckeyes after seven years in the NFL. He was linebackers coach for the New York Giants from 2005-08 before being promoted to defensive coordinator in 2009. He was relieved of the latter duties after only one season and spent the past two years coaching linebackers for the Miami Dolphins.
"I can't remember the last time I was more excited to take a job, and for obvious reasons," he said. "Ohio State has a historic, winning tradition, and I am very excited to be a part of that. And with the tremendous success Urban Meyer has had at each of his schools, I am honored to be a part of his staff."
Like Meyer and the majority of the rest of his staff, Sheridan has extensive ties to the Midwest. Unlike the others, however, most of that comes from the state of Michigan.
Sheridan played linebacker at Grand Valley State in Allendale, Mich., before spending the 1985 and '86 seasons as a graduate assistant at the University of Michigan on the staff of former Ohio State assistant coach Bo Schembechler.
He spent one year on head coach Bob Davie's staff at Notre Dame before being hired at Michigan by Llody Carr. Sheridan coached Wolverine linebackers, including All-Big Ten selection Victor Hobson, in 2002 before moving to defensive linemen for the following two years. Gabe Watson earned all-conference honors under Sheridan's tutelage.
Meyer described Sheridan as a perfect fit for the Ohio State program.
"His experiences in the NFL are huge," the head coach said. "He has Midwest roots and, most importantly, he wants to be an Ohio State Buckeye. I am really impressed with him and I think he is going to be a terrific addition to our defensive staff as a coach, teacher and as a recruiter."
Sheridan added recruiting coordinator to his duties his last two seasons in Ann Arbor and pulled in a pair of classes rated No. 1 in the Big Ten. The 2003 signees were ranked eighth in the nation while the '04 group was picked No. 5.
Sheridan's son, Nick, was a walk-on quarterback at Michigan from 2006-09. He started four games in 2008.
Sheridan replaces Taver Johnson, who coached Ohio State cornerbacks since 2007. Johnson left to coach linebackers at Arkansas earlier this month.