King & Spalding LLP added Amanda A. Sonneborn as a partner in its corporate, finance and investments practice. She advises clients on employment and workplace issues.Sonneborn was previously a partner at Seyfarth Shaw LLP.• Jenner & Block LLP partner Reid J. Schar was named co-chair of the firm’s nearly 400-lawyer litigation department.Schar is a former federal prosecutor who is known for his work on the prosecution of former Illinois Gov. Rod Blagojevich and the “Bridgegate” investigation in …