Robert S. Sklar has listed for sale a three-bedroom, four-bath at 1901 De Cook Ave. in Park Ridge for $579,000.

John Funk of Emarket Realty, Inc. is the agent for the listing.

The 2,098-square-foot home was built in 1956.

Sklar is a physics laboratory supervisor at University of Illinois at Chicago.

He previously worked at Bell Laboratories, formerly known as AT&T Bell Laboratories. He also worked as a consultant at Unisource Systems and Ameritech Communications, Inc.

There were 309 sales in Park Ridge in 2008, with a median sales price of $383,000.