Robert Walsh was named managing director of operations for OneChicago, the joint venture of the Chicago Mercantile Exchange, Chicago Board Options Exchange and Chicago Board of Trade, according to a news release from OneChicago. It is a new position. Mr. Walsh was vice president of trade processing for the CBOE, where he worked on extending the trading sessions on the exchanges electronic trading network, CBOEdirect. CBOE spokesman Gary J. Compton said Mr. Walshs duties there will be split among several existing staff members. Mr. Walsh also has worked on the OneChicago joint venture, which will trade single stock futures.