In September 2022, Rengeruk was banned for 10 months commencing April of that year due to the use of hormone therapy drug.

She pre-fixed a win at the Kenyan junior trials with a 3000 m best of 8:53.41 minutes on her IAAF Diamond League debut in Doha.

[3] Rengeruk's 2015 season was prematurely curtailed and she did not fare well at the 2016 African Cross Country Championships, managing only tenth in the junior race that year.

[8] In 2019, she competed in the senior women's race at the 2019 IAAF World Cross Country Championships held in Aarhus, Denmark.

[9] In September 2022, it was announced that Rengeruk had been banned from athletics for a period of 10 months commencing April 2022 for the use of hormone therapy drug Letrozole.