Allen & Overy landed the lead advisory role for General Electric on the $1.8 billion sale of GE’s fire alarm and security unit to Hartford, Conn.-based United Technologies, the conglomerate that makes Sikorsky helicopters, Carrier air conditioners and other big-name items, according to the company.

Wachtell, Lipton, Rosen & Katz advised UTC on the deal, according to a UTC spokesman.