King studied at Monash University, and taught the MBA program for the Australian Graduate School of Management in Hong Kong.
Bank 2.0, (2010) mapped technological innovations being used by banks to better use things like social media, mobile devices, and business intelligence—while pointing out that the world’s banks were adapting at a relatively slow pace as compared to the evolution of the technologies involved. Information Age wrote of the work that, “King’s overall argument is that the credit crunch and ensuing recession have intensified the need for innovation in the financial services sector.”
Branch Today, Gone Tomorrow, (2011) discusses further about how banks are not innovating fast enough to stay relevant against their competitors. One of the key arguments King uses, is that disruptive technologies change consumer behavior, which can lead consumers to leave their traditional institutions.
BANK 3.0. Why Banking Is No Longer Somewhere You Go But Something You Do (2012) King has said that the difference between this work and Bank 2.0 was that the former work was an awareness raising effort, and in Bank 3.0, King provides solutions to everyday banking problems—partially inspired by his app Moven. He also provides questions for banks to answer in terms of how they can regain their competitive edge.
Breaking Banks: The Innovators, Rogues, and Strategists Rebooting Banking?, (2014) named for his radio show, has the central premise that the banking system is broken, and that banking innovators are fixing the system rather than breaking it down themselves. Jane Haskin of Banking Exchange wrote that “every banker should read this book” and that “After I read one of Brett King’s books, I am always uneasy because it makes me realize how fast banking is changing.”
Augmented: Life In The Smart Lane (2016) is King's latest book. Following on from the Industrial or Machine Age, the Space Age and the Digital Age, the Augmented Age will be based on four key disruptive themes - Artificial Intelligence, Experience Design, Smart Infrastructure, and HealthTech. The book describes how society will be impacted by technologies that will change the world more in the next 20 years than it has in the last 250 years.
King is a guest blogger with Huffington Post, in addition to writing for the BBC. SeekingAlpha, and American Banker. He has also appeared as an industry commentator on cable and network news, . and hosts a radio show " Breaking Banks" on VoiceAmerica, with about nine million monthly listeners and with WVNJ 1160 in New York. He has also partnered with FinExtra to produce on-air interviews with women leaders in the financial tech sector.
He spoke as part of Asian Institute of Finance's Distinguished Speaker Series in 2017 entitled "Bank 4.0: Banking everywhere, but not at a bank" in Kuala Lumpur, Malaysia
In 2011 the mobile banking application Movenbank (now known as Moven) was founded by King and Alex Sion. The app provides real-time updates for debit card purchases. In July 2012 Moven raised an initial $2.4m of seed money the Beta version went live in February 2013. Moven was named "Best in Show" at Finovate 2013 in London. Moven raised a Series A investment round of $8m for product development and international expansion in July 2014. The company is headquartered in New York City and has partnered with banks including TD Bank in its app’s operation. For his work, in 2012 King was named "Bank Technology News Innovator of the Year" by the trade newspaper American Banker.