Former Sen. Jon Kyl (R-Ariz.) is returning to the lobbying world after his second stint in the Senate.

Kyl returned to work at Covington & Burling in its public policy practice, the firm announced on Monday. He worked there before he was appointed to the Senate to fill the seat held by the late Sen. John McCain John Sidney McCainKelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks Trump pulls into must-win Arizona trailing in polls MORE (R-Ariz.), his former colleague, who died in August.

Kyl announced in December that he would not stay for the remainder of McCain’s term, which ends in 2020.

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Sen. Martha McSally Martha Elizabeth McSallyKelly's lead widens to 10 points in Arizona Senate race: poll Senate Republicans scramble to contain fallout from Woodward bombshell Mark Kelly apologizes for offensive 2018 joke MORE (R-Ariz.) was appointed by Arizona Gov. Doug Ducey (R) to replace Kyl. The appointment came weeks after McSally, previously a member of the House, lost her own Senate race against then-Rep. Kyrsten Sinema (D) for the seat vacated by Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeRepublican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style Bush endorsing Biden? Don't hold your breath MORE (R), who retired at the end of the last Congress.

McSally and Sinema were both sworn in on Jan. 3.

Kyl, 76, first retired from the Senate in 2013 after serving as Republican whip. He was in the Senate for 18 years and spent eight years in the House.

He worked as a lobbyist for Covington from March 2013 to September of last year, when, in an unprecedented situation, he returned to the Senate.

Covington is based in Washington.