The firm rose quickly in the years immediately after its founding, gaining lucrative clients like the Pennsylvania Railroad Company in 1906, which was at the time under public scrutiny for denying information and interviews to journalists. Parker and Lee also worked for the Colorado Fuel and Iron Company during the controversial 1915 oilmen's strike, and later worked to end the American trade embargo on the Soviet Union. The firm came under fire during WWII because it had done consulting work for German industrial giant IG Farben.
Ivy Lee was born near Cedartown, Georgia as the son of a Methodist minister.
Lee espoused a philosophy consistent with what has sometimes been called the "two-way street" approach to public relations, in which PR consists of helping clients listen as well as communicate messages to their publics.
Lee also worked for Bethlehem Steel, in which capacity he famously advised managers to list their top priorities and work on tasks in that order, not proceeding until a task was completed.