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Dave MacKenzie began their work experience in 1985 as a Sales Engineer at Warner & Swasey Co. Dave worked in this role until 1989. In 1990, they joined Mahr Inc. and held various positions including Sales Engineer, Branch Manager (Chicago, IL), and Region Manager (Lansing, MI) until 1999. From 2000 onwards, they served as the Director of Sales at Mahr Inc.

Dave MacKenzie attended Northern Illinois University from 1974 to 1976 and obtained a Bachelor of Arts degree. The specific field of study during their time at the university is not provided.