John M. “Jack” MacBrayne, III was born in Washington, D.C. and grew up in Savannah, Georgia where his father was employed with the Union Bag and Paper Company. He completed high school in Mountain lakes, New Jersey and attended the University of Maine, receiving Pulp & Paper Foundation scholarships for three years. He graduated in 1969 with a B.S. Degree in Chemical Engineering and a 5th Year Certificate in Pulp and Paper Technology.
Following graduation, MacBrayne completed Officer Candidate school and served as a Supply Officer aboard the minesweeper, U.S.S. Detector. After serving in the Navy, in 1971, MacBrayne started his paper industry career with St. Regis Paper Company in Bucksport, Maine as Technical Assistant. In 1974, he was responsible for the start-up of the wastewater treatment plant. In 1975, he was promoted to Assistant Pulp Mill Superintendent and was responsible for the start of the Thermomechanical Pulp Mill. In 1979, he was promoted once again, this time to Pulp Mill Superintendent.
In 1984, St. Regis Paper merged with Champion International and four years later, MacBrayne was promoted to Director of Mechanical Pulping, transferring to Champion's corporate headquarters in Stamford, Connecticut. He was named Director of Capital Management in 1997, and transferred to Champion's Sartell, Minnesota mill. In 2000, Champion merged with International Paper just a year prior to MacBrayne’s retirement. Following retirement, MacBrayne returned to Maine.
MacBrayne became a member of the University of Maine Pulp and Paper Foundation Scholarship Committee in 1979 and become Chair of that committee in 1984.
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Chemical engineering, Pulp science, Paper manufacturing