Robert F. Arentz is the founder of The Law Offices of Robert Arentz. He started his career as a prosecutor, before leaving to work as the direcor of the Public Defender's Office in Cochise County. In 1993, he joined Phillips & Associates Law firm, where he served as the supervisor of the firm's criminal defense department for over 15 years.

In 2010 Robert Arentz left the firm to go into private practice, eventually forming The Law Offices of Robert Arentz. He has focused his practice over the last 30 years on criminal and DUI defense. Mr. Arentz uses his vast range of knowledge and experience as both a prosecutor and a defense attorney to provide dedicated and affordable representaion to all of his clients.