The Board of Directors of the Arizona School Boards Association on Monday announced that Panfilo Contreras, executive director of ASBA since 1998, retired as of July 8, 2011. Prior to becoming executive director of ASBA, Contreras was on the school board of the Flowing Wells Unified School District for nearly 12 years. He also served on the ASBA board of directors in various leadership positions for four years, including as president of ASBA in 1995, before becoming executive director.