at the 1999 fifa women's world cup, okosieme was playing for rivers angels. before the tournament she declared: "we no longer have an inferiority complex". she scored three goals in four games as nigeria reached the quarter-finals, losing 4–3 to brazil. okosieme enjoyed playing in america so much that she joined usl w-league club charlotte lady eagles and enrolled at university, where she played college soccer. the w-league is the highest level for women's soccer in u.s. today. in 2001, "nk" was the second highest goal scorer in ncaa div ii. she has won the peach belt conference player of the year, and in the all-regional team for four years. she was also a nscaa all-american.