Brennan will report to Neustar President and CEO Lisa Hook.
Brennan previously served as senior vice president for worldwide human resources at Verisign. The company credits her with implementing a global human resources strategy focusing on acquisition and talent management, compensation and benefits, employee engagement, corporate social responsibility and performance management.
Brennan also held senior human resource positions at British Telecommunications and AT&T.
“Christine’s wealth of human resources experience and her successful track record in implementing talent management and acquisition strategies will ensure we continue to attract and retain the best and the brightest in the industry,” Hook said.