John Georgiou will step down as chief executive of family-owned Georgiou Group after 20 years in the role, with executive general manager Rob Monaci to take up the position from August 1.
Mr Vorster replaced long-serving chairman Joe Trio in March 2016; Mr Trio has subsequently retired from the company's board.
The board also includes Mr Georgiou's father, Spiro Georgiou, who is a non-executive director.
Mr Georgiou became the group’s inaugural chief executive in 1998 and has since developed the business from a $50 million Western Australian company into a $600 million national enterprise.
Mr Monaci has been a key member of Georgiou’s leadership team, driving its business in NSW since 2014 and responsible for establishing and growing its presence in that state’s civil engineering market.
“Rob is an exceptional leader,” Mr Georgiou said.
“In the past three years he has led our growth in NSW and established the Georgiou brand in the transport sector within the state.”
Previously with John Holland as general manager, Mr Monaci has also held senior leadership roles with Thiess and BIS Industrial Logistics, with more than 30 years of engineering and construction experience.
“We have a great culture, the broadest capability in the market and a winning strategy that has enabled us to grow strongly,” Mr Monaci said.
“Building further on our success is a challenge I accept with great determination.
“Georgiou is in great shape and has a very solid base on which to build and I look forward to continuing to tap John’s knowledge and experience as chairman.”
Gary Georgiou (not related to the Georgiou family), will now oversee both the NSW and Queensland business as executive general manager Queensland.
Georgiou Group is WA's ninth largest construction company, as ranked by total combined value of local projects on the BNiQ Search Engine, with about $277 million worth of building development on its books.