Since being named Chief Sustainability Officer for the United States Postal Service in June 2011, Thomas Day has led the effort to adopt sustainable business practices and create a culture of conservation.

Working closely with Network Operations, Delivery and Post Office Operations, Facilities, Supply Management and external vendors, Mr. Day’s group sets policies and assists implementation in areas of Environmental Compliance, Sustainability and Energy Initiatives.

During his 28-year Postal Service career, he has developed a solid operations background from various assignments in delivery, distribution, and logistics, including service as district manager of the Southeast New England District from 1996 to 2000. Mr. Day has previously served as Senior Vice President of Intelligent Mail and Address Quality, Senior Vice President of Government Relations and Vice President of Engineering. In this capacity, he oversaw development of all engineering efforts involving automation and operations, building and equipment maintenance, and the Postal Service's award-winning environmental program.

Mr. Day is a graduate of the U.S. Military Academy at West Point, where he earned a Bachelor of Science degree in Engineering in 1978. He represented the Postal Service as a Sloan Fellow at Stanford University's Graduate School of Business, where he earned a Master of Science degree in Management in 1996. He also formerly served as Chairman of the Standards Board for the Universal Postal Union.