The firm of Isaacson & Walsh, P.C. was first formed in 1975 as Ladendorff & Ridge, P.C.   Don Isaacson joined the firm in 1980 as a young associate, followed two years later by Steve Duffy.    In 1983, when G. Henry Ladendorff retired from the practice of law, Don Isaacson joined Warren C. Ridge as a shareholder and the firm was renamed Ridge & Isaacson, P.C.  The firm moved its offices to what is now the CBIZ Plaza in Phoenix, where it remains today.  


Steve Duffy became a shareholder in 1987.  Upon the retirement of Warren Ridge in 2003, the firm’s name was changed to Isaacson & Duffy, P.C.  and continued as such until the end of 2009, when Steve Duffy retired from the firm.  Norm Moore joined the firm on January 1, 2010 and left on December 31, 2014.  During this time period, the firm operated as Isaacson & Moore, P.C.  


Cheyenne Walsh joined the firm on January 1, 2015 and the firm is now known as Isaacson & Walsh, P.C.