Kent Alexander, who has traveled the world since 2011 as general counsel of international aid organization CARE Inc., has joined Michelle Nunn’s U.S. Senate campaign as chief of staff and strategy.

Alexander announced his new position in a Dec. 27 letter emailed to friends and colleagues that also solicited contributions for a year-end fundraising deadline in Nunn’s campaign to win the Democratic nomination to replace retiring Republican U.S. Sen. Saxby Chambliss.

Alexander said in his email that he has joined Nunn’s campaign “to work full-time for a year toward making a difference much closer to home.”

Alexander could not be reached for comment to discuss whether his commitment means he is leaving CARE permanently or only taking a leave of absence. A CARE representative could not be reached immediately on Monday.

“I want to do something positive to help change Washington,” Alexander wrote of his decision to join Nunn’s campaign. “Too often we see rampant discord and dysfunction roiling our nation’s Capital. By contrast Michelle is all about common ground and solutions. I really like her and what she stands for. I really don’t like the partisan polarization.”

Alexander said he met Nunn 25 years ago when the two co-founded Hands on Atlanta—a nonprofit organization that since its founding in 1989 has recruited thousands of community service volunteers.

“Thanks in large part to Michelle’s vision and execution, our original group of a dozen volunteers working on four or five projects a month has evolved into four million volunteers working on 250,000 projects a year,” he said. “This is the can-do track record of accomplishment and bipartisanship Michelle would bring to Washington, much like her father (and my former law partner) Sam Nunn did during his distinguished Senate career.”

Michelle Nunn eventually merged Hands On Atlanta with former President George H.W. Bush’s Points of Lights Foundation, moved its headquarters to Atlanta and became Points of Lights’ CEO.

Both Alexander and former U.S. Sen. Nunn were partners at King & Spalding. Alexander also has served stints as U.S. Attorney for the Northern District of Georgia, as an appointee of President Bill Clinton, and as Emory University’s general counsel and senior vice president.