Dennis DeConcini worked as a lawyer for the Arizona governor’s staff (1965-1967) and founded the law firm of DeConcini, McDonald, Yetwin & Lacy where he is still a partner with offices in Tucson, Phoenix and Washington, D.C. He was then elected a U.S Senator, serving three terms from 1977 until 1995. While in office he sponsored an amendment to the Panama Canal Treaty of 1977, allowing the U.S. to take steps deemed necessary to reopen the Canal and restore its operations.
DeConcini served on a number of committees such as the Senate Appropriations Committee where he chaired the subcommittee on Treasury, Postal Service and General Government. DeConcini also served on the Senate Judiciary Committee and chaired several subcommittees. In February 1995 DeConcini was appointed by President Clinton to the Board of Directors of the Federal Home Loan Mortgage Corporation, where he served until May 1999. In 2006 the former senator was selected by the governor of Arizona to serve as a member of the Arizona Board of Regents.