Hook, who has been CEO since 2010, will remain on the board.
Neustar has appointed Charles Gottdiener its new President and CEO, replacing Lisa Hook.
Hook had been in her role since 2010 and was COO for two years before that.
She managed the company during tumultuous times. It lost its Number Portability Administration Center (NPAC) contact, which was the company’s main revenue base. She worked to diversify revenue ahead of the contract bidding, mostly by acquiring companies.
Two years ago the company announced that it planned to split into two companies, with one handling what was left of the NPAC contract and the other managing the rest of its businesses.
Instead, it went private in a $2.9 billion buyout from private equity firm Golden Gate Capital.
Gottdiener comes from private equity. As COO at Providence Equity Partners, he often stepped in as interim CEO of portfolio companies.
Hook will remain on Neustar’s board.
Neustar is a big player in the domain name registry business, managing the .biz, .co and .us domains as well as many new top level domains. Earlier this year it lost a key contract to manage Australia’s .Au namespace.