All posts tagged 'Doug MacCallum'

One Systems President Doug MacCallum Dies At 62

Posted on September 13th, 2018 · Posted in One Systems, Press Releases

One Systems President Douglas “Doug” Wayne MacCallum passed away on September 11 at his home in Brentwood, TN, following a year-long battle against a rare form of leukemia. A veteran of the professional audio industry, MacCallum began his career in 1978 as sales manager of Cambridge Marketing Group, a manufacturers’..
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