Rudolph began ICS in September 1990.
Cohn was previously director of industry solutions at the Naperville Ill.-based CPA firm from August 2012 through December 2013. Before that he owned Streamline Systems from April 1994 through April 2012.
The technology practice sells Microsoft Dynamics AX, GP and NAV financial applications, along with the cloud-based NetSuite accounting package. It also has a strong market in infrastructure services.