The Council of Parent Attorneys and Advocates is a national organization with members who are parents of students with special needs, Advocates and Attorneys who represent students with disabilities, and "other" providers, etc who advocate for students. In addition to many other resources and information available on their website, COPAA has an online directory to assist parents (both within COPAA's membership and members of the public) with finding and Attorney or Advocate in their area.
Often, Parents need to seek the assistance of a special education attorney or educational advocate to represent them in IEP meetings or in legal disputes with their school district. An advocate or special education attorney can help parents through the process and provide representation when there is a dispute over placement and/or services.
COPAA's online directory is a great tool to assist parents with locating representation when they need it. You can go to the Find an Attorney / Advocate directory at this link: http://www.copaa.org/find-a-resource/find-an-attorney/