Leo commenced his career in accounting in 1980 with KPMG working in the taxation area. In 1987 Leo entered into his own practice, in partnership, operating as public accountants and tax agents in Darwin. Leo was also involved in his family’s wholesale and retail business for many years.

Now Leo Cleanthous and Associates is a well known Darwin accounting practice which is expanding by joining CrediFlex. "One of the major benefits of becoming a partner in CrediFlex is that I can now provide my clients with the full range of financial services products, in particular home lending, which is a real value add for them". Through CrediFlex, Leo is now able to deliver the quality products and service that Leo has been seeking for his clients.