Larry Cohn has become co-partner-in-charge of technology at CPA firm Sikich. But the "co" part of the title won't last as the other holder of the title, Jeff Rudolph is retiring at the end of 2014. Rudolph has been at Sikich since September 1998, coming to Sikich via the merger of his business, Intelligent Computer Solutions, with the accounting firm then known as Sikich Gardner. He began ICS in September 1990. Cohn was director of industry solutions at the Naperville Ill.-based CPA firm from August 2012 through December 2013.