For 34 years, Dennis J. Toner directed policy, public and political affairs on the staff of then-Senator and now -Vice President Joseph Biden, Jr., and served as his deputy chief of staff from 1995 to 2005. Following his career on the staff in the United States Senate, Governor Toner launched a private practice, Horizon Advisors, which provides guidance and strategic planning to private clients and nonprofit organizations. Horizon Advisors also maintains a professional resource network intended to advise and promote dialogue among the public, private and nonprofit sectors.
Dennis J. Toner was appointed a governor of the U.S. Postal Service by President Barack Obama on September 17, 2010, for a term that expired on December 8, 2012, serving a statutorily permitted one-year holdover. Dennis J. Toner served as Chair of the Governance, Regulatory, and Strategic Planning Committee, and a member of the Audit and Finance Committee and the Operations Subcommittee of the Audit and Finance Committee.
Dennis J. Toner is a graduate of the University of Delaware and lives in Rehoboth Beach, Delaware, with his wife of 32 years, Ann Toner. The Toners have three children, Sara, Matthew and Paul.