Mahmood Ahmadu is a Nigerian entrepreneur and the Founder and Executive Chairman of Online Integrated Solutions Ltd (OIS).

He began his entrepreneurial journey in the early 1980s, investing inherited capital to establish A2A International Limited, becoming an early pioneer in GSM trading in Northern Nigeria. Over the years, Ahmadu expanded his business interests locally and internationally and has supported education and community development through scholarship initiatives. He is a recipient of Nigeria’s national honour, Officer of the Order of the Niger (OON), and has received multiple lifetime and community impact awards.