Arnold Klein graduated with a BS degree in biology. After graduation, he taught science for 4 years at the high school level. He taught New York Regents level biology and general science for 4 years. After teaching, he moved on to a city job doing social work with foster children and their foster homes. Besides doing case work he called his investigative skills into play by locating missing parents. Later he became a New York City Probation Officer and continued to do casework and further refined his investigation skills completing pre-sentence reports for judges at time of sentencing for the defendants. Part of his assignment at the supervisors level was to analyse the legal aspects of the cases and to know the criminal and procedural law to complete this. Probation Officer Klein also had to appear in court on occasion to defend probation cases. Arnold Klein retired in 2009. Since then for approximately a year and a half, he worked for a large department store as a loss prevention security guard. As a loss prevention security guard he had to be on the lookout for shoplifters. He also has an interest in short story writing and have had some science fiction stories published in fanzines.