Since joining Delta in August 2005, Glen has overseen the transformation of the airline’s network from a primarily domestic operation to a nearly even mix of international and domestic service, including Delta flights to six continents and extended reach through a leading trans-Atlantic joint venture with Air France-KLM and Alitalia. During this time, Delta substantially improved its revenue performance compared to its competitors, and redesigned scheduling practices to build a consistently profitable network. Under Glen’s leadership, Delta has added more than 70 destinations to its worldwide network, including the first nonstop service to Africa by a U.S. carrier in nearly 20 years, substantially increased reach in Asia, and established a leading presence in New York at both LaGuardia and John F. Kennedy International airports. In 2012, Glen oversaw Delta’s historic expansion at LaGuardia, which added 100 flights and 30 new destinations at New York’s premiere airport for business travelers, and the establishment of a new trans-Pacific joint venture with Virgin Australia.

Glen also has directed significant enhancements to Delta’s product, both on the ground and in the air, and implemented significant enhancements of Delta’s technology and ecommerce. Glen oversees Delta’s community engagement campaign, which inspires and enables thousands of employees to become more involved in the communities where they work and live.

Under Glen’s leadership, Delta was named the “Top Tech-Friendly U.S. Airline” by PCWorld magazine for its innovation in technology.

Before joining Delta, Glen served as vice general director for Alitalia, serving in the dual role of chief commercial officer and chief operating officer. In his role as chief commercial officer, Glen led a major restructuring of Alitalia's route network, which improved schedule connectivity by more than 50 percent. Under Glen's leadership, Alitalia's revenues grew nearly 20 percent while the aircraft fleet was reduced by more than 10 percent. 

Prior to joining Alitalia in 2003, Glen was senior vice president, Network for Continental Airlines, where he was responsible for planning and execution of the airline's schedule, fleet, pricing and revenue management strategies. Glen joined Continental in 1987 as International Controller.

Glen is a 1982 graduate of Stetson University, where he received a bachelor's degree in Finance.