In a statement, the company said on Monday that the new name would take effect immediately while the change in its ticker code would take a while.
The company's new website went live on Tuesday morning and it plans to recruit 270 workers this year.
“The Arq Group moniker has been incredibly well received by our employees, customers, partners and our shareholders,” Martin Mercer, chief executive of Arq Group, said.
“By uniting our wide range of services, cultures and people under one banner, we now have unparalleled expertise across the digital services space.
"From design thinking and customer solutions, best in class mobile, cloud and analytical insights solutions, to digital marketing and website design, we are truly Australia’s leading digital partner, powering the growth of businesses, big and small.”
The rebranding was announced last month to emphasise the company's role as a full service digital partner, by bringing together overlapping skills from individual businesses.
In its statement, Arq Group said: "Building on its proud heritage, Arq Group will continue to solve complex challenges for large and small businesses across the country, as they look to traverse and thrive in a digital world.