Cox received a one-year contract from Jordan last summer, but will not return for another season.
"David is a good man and a good coach," Jordan said in a statement. "We wish him nothing but the best moving forward. We are very busy assessing the program, head to toe, starting with me. This will be an ongoing process as we prepare for Big Ten membership."
Cox was best known as a recruiter in the Mid-Atlantic, where Jordan has his own preexisting ties. He joined the staff under coach Mike Rice, and served twice as acting head coach during last spring's abuse scandals.
Assistants Kyle Triggs and Van Macon make up the coaches still on staff with an opening to fill as Jordan leads Rutgers into the Big Ten.