Cumberland City Council appointed new general manager Peter J Fitzgerald, who has acted in the role since February.
At Wednesday's council meeting, councillors unanimously voted to appoint Mr Fitzgerald after a merit-based recruitment process.
Formerly council's director of infrastructure and works, he helped mold the organisation through the merger and has led key infrastructure projects including the Wentworthville Pool and The Eric Tweedale Stadium at Granville Park.
Mayor Steve Christou said he had worked with Mr Fitzgerald for four years.
"We are fortunate that a candidate of Peter's experience and caliber has accepted the role. He's demonstrated that he's a good fit for Cumberland and has a clear vision for how best to operate to deliver the facilities, infrastructure and services our community needs. With Peter at the helm, we're well placed to maintain a good financial position."
Mr Fitzgerald said: "I'm looking forward to continuing to work alongside the committed and passionate staff, particularly as we work through the pandemic. There's many exciting opportunities ahead for this local government area."
Mr Fitzgerald was appointed for a five year term.