Overview  Linden Oaks is a nonprofit organization serving more than 200 individuals with exceptional needs annually, through a variety of service lines. The clients served include children from 18 months of age, to senior citizens. Established in 1955, Linden Oaks takes pride in its recognition as a leader in special needs services and in its innovative approach to therapeutic programs—with a history spanning 70 years.  Linden Oaks was founded in 1955 by two speech therapists, Dr. Aleen Agranowitz and Gladys Gleason