Donald A. McCunniff is the Executive Vice President and Chief Human Resources Officer at Martin Marietta Materials Inc., a Fortune 500 company and one of the largest producers of aggregates and heavy building materials in the United States. In this capacity, he leads the global human resources organization, overseeing talent acquisition, leadership development, compensation and benefits, labor relations, and diversity, equity, and inclusion initiatives for more than 9,000 employees across North America. McCunniff's strategic vision has been instrumental in aligning HR practices with the company's growth objectives, emphasizing safety, operational excellence, and employee engagement in a demanding industry. With over 30 years of HR leadership experience, McCunniff joined Martin Marietta in 2014 as Vice President of Human Resources before ascending to his current role. Previously, he served as Senior Vice President of Human Resources for BD Medical at Becton, Dickinson and Company, where he managed HR for a $6 billion global business unit employing over 20,000 people, driving organizational transformations and talent strategies during periods of rapid expansion. Earlier in his career, he held progressive HR roles at Johnson & Johnson, gaining expertise in change management, mergers and acquisitions integration, and performance optimization. Under McCunniff's tenure, Martin Marietta has launched innovative programs such as leadership academies, succession planning enhancements, and comprehensive DEI efforts, contributing to industry-leading employee retention rates and recognition as a top workplace by Forbes and others. His leadership has supported the company's successful navigation of labor market challenges and strategic acquisitions, solidifying Martin Marietta's reputation as an employer of choice.