Dinos graduated from the London School of Economics obtaining a BSc (Econ.) with First Class Honours. He then worked with KPMG London and following his admission to the Institute of Chartered Accountants in England and Wales he specialised in mergers and acquisitions. He later joined Bank of Cyprus to work with companies with financial and management problems and afterwards headed the International Business Unit of the Bank. He then set up his own investment and advisory business with clients in a diversified industry portfolio working in M&A, corporate finance, debt advisory and corporate recovery. He is also a member in boards of financial and non-financial companies. In March 2023 he joined Oaklins Baltics.