Automatic Data Processing, the Roseland, N.J., provider of payroll and other HR services with $10.7 billion in 2011 revenue, named Jan Siegmund CFO. Siegmund, 48, pictured at right, replaces Christopher Reidy, ADP’s CFO since 2006, who is leaving the company. Siegmund has served as ADP’s chief strategy officer since 2009 and president of its added value services division since 2007. He joined ADP in 1999 as vice president of corporate strategy, and since then also served as corporate vice president of strategic development and senior vice president of strategic development for ADP’s brokerage services group. Prior to joining ADP, he worked at McKinsey & Co. for six years.