Hi my name is john l Holland. I was born on October 21 1919 in Omaha Nebraska. When i was 20 i worked after school at the YMCA. once 1]Holland eventually studied psychology,French, and math at the Municipal University of Omaha and graduated in 1942. He is the inventor of the Holland code
John began studying psychology at the Municipal University of Omaha, and, following his graduation in 1942, his interest in the discipline was further stoked during his three-year service in the U.S. Army and subsequent matriculation at the University of Minnesota.
After graduation, Holland served in the army for three years where as a private he "worked as a classification interviewer, test proctor, paralegal clerk, laborer,squadron clerk, psychological assistant, and Wechsler test administrator.He was also able to work with and get training from social workers, psychologists, and physicians—experiences that stimulated his desire to become a psychologist."
The origins of Holland's Occupational Themes or the Holland Codes: "can be traced to an article in the Journal of Applied Psychology in 1958 and a subsequent article in 1959 that set out his theory of vocational choices [....] The basic premise was that one's occupational preferences were in a sense a veiled expression of underlying character."  Holland's typology provides an interpretative structure for a number of different vocational interest surveys, including the two measures he developed
jhn L. Holland, Ph.D., died in Baltimore on November 27, 2008, at Union Memorial Hospital. Professor Emeritus of Sociology at the Johns Hopkins University, Dr. Holland was the recipient of the 2008 Award for Distinguished Scientific Applications of Psychology from the American Psychological Association. He was known for his theory of vocational personalities and work environments, which shaped the ways vocational assistance is provided to people by counselors and psychologists around the world
Holland died In November 2008, John Holland - whose pioneering work in occupational personalities and environments gave career counselors new tools and perspective to help them guide their clients during career explorations and job searches - died in Baltimore, Maryland.