Realogy Holdings, the largest full-service residential real estate services company in the United States, has appointed John Brennan as chief ethics & compliance officer, in addition to his current role as chief audit executive.

In this role, Brennan expands his current role as chief audit executive to assume leadership for Realogy's ethics and compliance program.

Brennan, who joined Realogy in 2017, succeeds former Chief Compliance Officer Liz Gehringer who was recently named chief operating officer of Coldwell Banker Real Estate. In addition to his new role, he will continue his management of Realogy's enterprise risk management program and internal audit.