Eric Chewning, who has served as deputy assistant secretary of defense for industrial policy since October 2017, has accepted the position of chief of staff to Acting Defense Secretary Patrick Shanahan, the Pentagon announced Tuesday. As the top DOD official responsible for fostering the defense industry, Chewning played a major role in the administration’s review of the health of the defense sector, reported Defense News. … Despite President Trump’s recent pronouncement that Shanahan could lead the Pentagon “for a long time,” the White House has been searching for a permanent replacement for his predecessor Jim Mattis. The effort, however, has not proved fruitful, reports Politico. Former Arizona Sen. Jon Kyl (R) last week became the second person to say he is not interested in the job. Retired Army Gen. Jack Keane previously turned down the job. Kyl temporarily filled the late Sen. John McCain’s seat last year, after serving three terms in the Senate before retiring in 2012.