Donna Hilley has announced her retirement from Sony/ATV Music Publishing, after 31 years with the Nashville company. As president and chief executive officer of Sony/ATV, Hilley is considered one of the most distinguished women in the country music business. Publishing veteran Troy Tomlinson, who joined Sony/ATV in 2002 after the company purchased Acuff-Rose Music, will assume the top position Jan. 1, 2006.