Mr. Mallder has been the senior vice president of development at Escalate Retail Inc.
Previously, he was a partner in business consulting services at IBM Global Services. He also served as vice president at Mainspring. He attended George Mason University and Illinois State University.
There are 338 units in the 70-story building at 150 W. 56th St., which also is known as City Spire. It was constructed in 1987.
According to BlockShopper.com, there have been 162 condo sales in Clinton/Hell's Kitchen during the past 12 months, with a median sales price of $785,000.
Address: 150 West 56th Street, Unit: 3702
Buyer(s): Barbagallo and Gabriella
Seller(s): Mallder, Spencer, Wolf, Christina M, Mallder and Christina
Sale date: Feb. 24, 2010