Career
She was the first Kenyan woman weightlifter at the Olympics and the second from Africa after Uganda’s Irene Ajiambo. In 2010 she competed at the in Delhi and finished in 5th position in the up to 69 kg weight class. Obiero competed at the 2012 Summer Olympics in London where she qualified and finished 13th in the up to 69 kg category.
Her heaviest lift was 181 kg.
At the 2014 in Glasgow, she finished in 8th place in the women"s under 69 kg weight class. To 117 kg she did 200 kg back squat along with team mates James Adede, Webstar Lukose, Stephen Opondo and Arthur oyim who was also coached by David Adeyemo the youngest Coach.