Established in Australia in 2002, Quantium now has a network of 10 offices around the world, including in San Francisco, Chicago, Bentonville, London, Johannesburg and Hyderabad.
"There are just under 25 million people in Australia, so it's imperative that ambitious Australian businesses should be looking to take their smarts to bigger markets," said Keusgen.
"For instance, there are 263 million Indonesians right in Australia's front yard and 166 million of them are on-line. Just think about the data opportunities that will present as the middle class continues to explode.
"Australia has many great assets, not least our location on the doorstep of the world's largest developing economies. We are known as an honest broker, for our respect for the rule of law and our relative political independence.
"We can leverage these perceptions to secure a reputation as a global centre of data ethics and security and I'm confident that Quantium will lead the charge."
Keusgen joins the company from Google, where he spent 12 years in senior roles in the Asia Pacific region including Indonesia and New Zealand.
He previously served as sales and marketing manager at Alphawest, national channel business manager at Optus, and NSW sales manager at Macquarie Telecom.
Keusgen holds a bachelor's degree in applied science from RMIT University.