The longtime artistic director and general manager of the Flagstaff, Arizona, Symphony, Weller created the Philharmonic in 1998 with casino developer Andrew Tompkins and his wife Susan. The group is now the third-largest arts organization in Nevada.
"When Susan and Andy Tompkins and I founded the Philharmonic, we promised each other that it would avoid becoming a founder-driven institution," Weller said in a statement. "With Andy's death last year and Susan's relocation from Las Vegas to Honolulu, it is now time that I, too, make my exit and allow the Philharmonic to achieve true independence as an orchestra. "
Weller had previously served as music director of Nevada Dance Theatre and was a professor of music at the University of Nevada, Las Vegas.
He will be a member of the search committee seeking his successor.