Kerins has spent the last three years in the position at the Buckhead school.
“We are so very fortunate that she chose to cap her impressive career in our midst, bringing her extensive experience in independent school leadership and her deep knowledge of design thinking and integrated learning to Westminster,” said Clarkson, who also will retire at the end of the school year.
McKnight’s promotion has been approved by Westminster’s incoming president, Keith Evans, who will start in July, and endorsed by Kerins.
“Whit began his career with Teach for America and then taught elementary school in Newark, New Jersey and Washington, D.C. before joining us in 2005,” Clarkson said. “He also has directed Odyssey’s elementary school program here on campus.”