Simplify the following text for a Grade 14 native English-speaking person.
Original: When the Conservative-Liberal Democrat coalition government was formed on May 11 , 2010 , Alexander was appointed as the Secretary of State for Scotland , however was made the Chief Secretary to the Treasury on May 29 , 2010 .
Simplified: He was initially appointed Secretary of State for Scotland for the coalition government , then was appointed Chief Secretary to the Treasury after the resignation of David Laws on 29 May 2010 .