BMC Stock Holdings, Inc. announced the appointment of Mark Alexander and Henry Buckley as Board of Directors, effective immediately. With these appointments, the BMC Board expands to 10 directors. Mr. Alexander is the founder, Chairman and Chief Executive Officer of Landmark Property Group. A seasoned business executive with more than 35 years of experience, he previously served as CEO, President and Director of Suburban Propane Partners and in joint business development and M&A roles at Hanson PLC. He currently serves on the Board of W.P. Carey, Inc., where he chairs the Audit Committee and is a member of the Compensation Committee. Mr. Buckley currently serves as president, Chief Executive Officer and Director of Uni-Select. He previously served in a number of leadership roles at W.W. Grainger, Inc., including most recently as Vice President, Specialty Brands and Mergers & Acquisitions. Â Mr. Buckley brings more than 35 years of experience to the Board, having served in management roles across a number of manufacturing, distribution and building materials companies.