Josephine Ada Omaka started her career as a junior sprint runner and hurdler in Nigeria where she competes in various local competitions. She won major competitive gold medals at the 2011 and 2010 Summer Youth Olympics in athletics at 100 metres events and also sparticipated at The women's 4 × 100 metres relay at the 2012 World Junior Championships in Athletics which was held at the Estadi Olímpic Lluís Companys on 13 and 14 July, she also won the 2009 African Junior Championships event in the category 100 metres and another silver at the Nigeria 4*100 m relay in 2009 competition with Margaret Benson, Goodness Thomas and Wisdom Isoken. Furthermore, she participated in the African 4 × 400 m relay team that won silver medals at the 2010 Summer Youth Olympics with Nkiruka Florence Nwakwe, Izelle Neuhoff and Bukola Abogunloko.