During more than 20 years with international accounting firms, Santanu has gained knowledge and experiences in vary businesses and industries e.g. manufacturing, trading, construction, telecommunication, advertising, natural resources, fisheries, trading, services, and others including non-profit organizations, world bank special programme, united nations organization grants, and foreign aid foundations. Santanu has involved in many assignments both international and domestic covering audit, accounting assistance, internal control review, reporting compliance, agreed-upon procedures and due diligence.