Nathan J. "Nate" Kornfeld was named chief operating officer and...

Nathan J. "Nate" Kornfeld was named chief operating officer and executive vice president at GMAC Institutional Advisors LLC, a new position at the Horsham, Pa., money manager. Mr. Kornfeld previously was director of strategic planning and mergers and acquisitions at GMAC Commercial Mortgage Corp., the parent of GMACIA. He will continue in that role until a replacement is found, said GMAC Commercial Mortgage Corp. spokeswoman Joyce Patterson.