A top executive at NYSE Euronext, which operates multiple securities exchanges and is in the final stages of being acquired by Atlanta-based IntercontinentalExchange, is leaving the company to join ADT Corp., the home security company.

Michael Geltzeiler, chief financial officer of New York City-based NYSE Euronext, will hold the same position at ADT, the Boca Raton, Fla.-based company announced.

Geltzeiler is expected to join ADT shortly after the expected close of ICE’s $10.9 billion acquisition of NYSE Euronext set for Nov. 4, pending final regulatory approvals in several European countries.

When the deal was announced last December, the companies said ICE Chairman and Chief Executive Officer Jeffrey Sprecher and ICE Chief Financial Officer Scott Hill will hold those same positions at the combined company.

Duncan Niederauer, chief executive officer of NYSE Euronext, will become president of the combined company and CEO of NYSE Group. And four members of the NYSE Euronext board of directors will become directors on the ICE board, which will be expanded to 15 members.

ICE spokeswoman Kelly Loeffler said no other management changes have been announced. She said NYSE Euronext has 3,154 employees globally and ICE has about 1,100.

ICE, a global operator of commodities and derivatives exchanges, and NYSE Euronext, which operates the New York Stock Exchange and the Euronext exchange, said the deal’s completion is contingent upon final clearances from regulators in Belgium, France, the Netherlands, Portugal and the United Kingdom.

The new company will operate global exchanges and service transactions involving agricultural and energy commodities, credit derivatives, equities and equity derivatives, foreign exchange, and interest rates.