Southwest Airlines has added former U.S. Senator Roy Blunt, a Republican from Missouri, to its board of directors.

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Blunt, 73, spent 14 years in the U.S. House of Representatives and served in the Senate from 2011 until leaving office in January as the fourth-ranking Republican. He did not seek re-election last year.

Roy Blunt

Former Missouri Sen. Roy Blunt was appointed Sunday to Southwest Airlines' 15-person board of directors. Blunt retired from the Senate last year and was succeeded by then-Missouri Attorney General Eric Schmitt, a fellow Republican. (AP Photo/Matt Rourke, File)

Since April, Blunt has worked at Husch Blackwell Strategies, a Washington, D.C., lobbying firm that also employs his son and former aides. The firm said Blunt would focus on advising clients and did not plan to register as a lobbyist.

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Southwest Chairman Gary Kelly said Monday in prepared remarks that Blunt's experience as chairman of the Senate aviation subcommittee would be helpful to the airline.

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The appointment took effect Sunday. Dallas-based Southwest now has 15 directors.