As a young clinician at Bellevue Hospital, Machover collaborated with a small group of activists there (including his future wife Karen Alper) to found the Psychologists League.
He was a member of the Communist Party caucus at Bellevue and became the first Chairman of the League.
It was a Popular Front group with liberal, socialist and communist members that agitated for jobs and better treatment for psychologists [2] Machover became a full professor at SUNY Downstate Medical Center in 1961.
[3] In 1971, Machover was the chief psychologist at Kings County Hospital Center.
In 1948, Machover became a Fellow of the Society for Projective Techniques and Rorschach Institute, Inc.[4] In 1936, Machover married psychologist Karen Alper from Minsk, Belarus.