Jonathan Grayer is resigning as chairman and CEO of the Washington Post Company’s Kaplan Higher Education unit after 17 years in the role. His replacement is Andrew Rosen, who has served as COO since Grayer became CEO in 1992; he’s been with the company since 1986. While WaPo is mainly known for publishing the Washington Post and Newsweek, it’s the Kaplan unit that’s been the prime revenue driver lately. The education division produced revenues of $602 million in Q3, more than half of WaPo’s total $1.1 billion. Year-to-date, the Kaplan segment revs rose 15 percent to $1.7 billion, while during the same period, WaPo’s total revs grew only 8 percent to $3.2 billion. Release