She took part at the 2007 world Championships, but was 12th overall and missed the 1500 m final.
In 2008 she would have been eligible to defend her Junior World title, but she placed fourth at the Kenyan trial and was not selected.
|2005||World Cross Country Championships||Saint-Galmier, France||2nd||Junior race|
|World Youth Championships||Marrakesh, Morocco||1st||3000 m||9:01.61|
|2006||World Cross Country Championships||Fukuoka, Japan||2nd||Junior race|
|World Junior Championships||Beijing, China||1st||3000 m||9:02.90|
|2007||World Cross Country Championships||Mombasa, Kenya||3rd||Junior race|
|All-Africa Games||Algiers, Algeria||2nd||1500 m||4:09.11|
|World Championships||Algiers, Algeria||22nd (sf)||1500 m||4:21.50|
|2008||African Championships||Addis Ababa, Ethiopia||5th||5000 m||15:53.55|
|Olympic Games||Beijing, China||41st (h)||3000 m s'chase||10:01.69|
|2012||African Championships||Porto Novo, Benin||2nd||5000 m||15:40.65|
In the 2005 Kenyan Sports Personality of the Year awards, Wanjiru was selected the most promising sportswoman of the year. She finished third at the sportswoman of the year category, behind Catherine Ndereba and the boxer Conjestina Achieng.
- IAAF, June 18, 2008: Kenyan Trials lead to squad of 23 selections for Bydgoszcz
- Valiente, Emeterio (2009-12-21). Sánchez defeats European champion Bezabeh in Venta de Baños. IAAF. Retrieved on 2009-12-27.
- IAAF, March 2, 2006: Athletes dominate Kenyan Sports Awards