Chief executive Ashley Muldoon has been in charge of UK business since 2010

Multiplex chief executive Ashley Muldoon is leaving the 拢1bn turnover contractor after 22 years at the business.

The 47-year-old Australian first came to the UK in 2003 when he was brought in by the firm鈥檚 then Australian founder John Roberts to project manage its breakthrough UK job, the scheme to rebuild Wembley stadium.

In a statement, Multiplex said the firm and Muldoon 鈥渉ave agreed to part ways on an amicable basis鈥.

The losses Multiplex racked up on Wembley meant the business, then listed on the Sydney stock exchange, was later sold to Canadian developer Brookfield.

Ashley_-Muldoon

Muldoon (pictured), who leaves tomorrow, was appointed chief executive of the firm鈥檚 Europe, Middle East and Canada business in 2010.

Chief operating officer Callum Tuckett, whom Muldoon brought into the business from Laing O鈥橰ourke two years ago, is expected to take day-to-day control of the UK arm.

But in its statement, Multiplex said John Flecker, its chief executive officer for Australasia and India, has been appointed to the new position of global chief executive officer.

It added: 鈥淛ohn will now take responsibility for Multiplex鈥檚 EMEC [Europe, Middle East and Canada] teams. He will work closely with chief operating officer Callum Tuckett and the other EMEC executives to ensure a smooth transition and an ongoing focus on outperformance across all of our operations.鈥

Flecker has been at the business 32 years and on Multiplex鈥檚 global leadership team for the past decade.

One source told 黑洞社区: 鈥淚鈥檓 really shocked. Ashley was one of the straightest guys in the industry. He鈥檒l be a big loss for Multiplex.鈥

Under Muldoon, the firm鈥檚 jobs have included the towers at 100 Bishopsgate and 22 Bishopsgate in the City of London.