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John Greivell has extensive work experience in various roles, primarily as a Vice President. John started their career at Clean Harbors in 1990 as a General Manager and worked there until 1996. From 1996 to 2018, they served as a Vice President at Raeco LIC LLC. In 2018, they joined Lesman Instrument Company as a Vice President.

John Greivell earned a Bachelor of Science (BS) degree in Criminal Justice from the University of Wisconsin-Milwaukee. No specific start or end year is mentioned for their education at this institution.