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Ronald Speller has extensive experience in the construction materials industry, currently serving as the Manager of Strategic Purchasing at Carlisle Construction Materials BV / Carlisle Hardcast Europe BV since January 2016. Prior to this role, Ronald held various positions at Carlisle Hardcast Europe BV from January 1999 to December 2015, including Operations Manager and Purchase Supervisor. Ronald's educational background includes studies at Inholland University of Applied Sciences from 1991 to 1994, MBO Hilversum from 1986 to 1990, and Maria Mavo from 1981 to 1985.