Ms Colley has previously held senior executive roles at Macquarie Bank, St George Bank and BT Financial Group.
Decimal said Ms Colley will play a vital role in driving the company through “digital disruption” in the financial services industry.
“Her mission is to accelerate Decimal’s market strategy and product development activity, leveraging her unique understanding of the financial services marketplace and how it is being transformed by digital technology,” the company said.
Ms Colley said she was confident of tackling the challenges surrounding compliance in the financial services sector.
“I am passionate about how technology can solve our compliance problems, help build consumer trust and confidence in our financial institutions and make advice more accessible to Australians,” she said.
“I look forward to playing a role in bringing this to fruition.”
Ms Colley started her new role in November.