SIAO is a merger of 4 Firms (Smith Sule & Co, Ighodalo & Co, OA Consulting, Robert Ade-Odiachi & Co) with combined post qualification experience of over 80 years. These partners, who previously ran highly successful accounting and financial consulting firms of their own, decided to come together to combine competences to form a single entity with the scale and ability to meet the needs and challenges of today's market.