What did Gary C. Butler do?
Gary C. Butler was the CEO and president of Automatic Data Processing. He held this position from August 2006 through November 2011, and had been with the company for 37 years. From 1990 to 1995, he served as Group President for ADP's Dealer Services Group; and from 1995 to 1998 he served in the same capacity for ADP's Employer Services Group. Prior to assuming his role as CEO in 2006, Butler was President and Chief Operating Officer of the company.
Gary C. Butler was the CEO and president of Automatic Data Processing.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------
Gary C. Butler was the CEO and president of Automatic Data Processing. He held this position from August 2006 through November 2011, and had been with the company for 37 years. From 1990 to 1995, he served as Group President for ADP's Dealer Services Group; and from 1995 to 1998 he served in the same capacity for ADP's Employer Services Group. Prior to assuming his role as CEO in 2006, Butler was President and Chief Operating Officer of the company.
----------------
Answer the following query.
What did Gary C. Butler do?

user
Gary C. Butler was the CEO and president of Automatic Data Processing.
assistant