Dr. Dan E. Arvizu was honored at the 16th annual Wirth Chair Sustainability Awards Luncheon for his longtime leadership at NREL. The longest-serving director and chief executive in the research organization's history, Arvizu is retiring after 10 years at its helm. During Arvizu's tenure, NREL's research portfolio has nearly doubled. NREL has increased commercial and public partnerships, and the stature of laboratory's leading energy analysis capabilities have expanded.