[5] The world competition proved to be a pivotal moment for Kamworor's career, although it was his teammate Isiah Kiplangat Koech who was the pre-race favourite.

[2] A month after his cross country victory, he entered the Berlin Half Marathon and won in a time of 1:00:38 hours.

[7] Kamworor was employed as a pacemaker for the 2011 Berlin Marathon and his work resulted in a new world record for Patrick Makau.

[13] He set a half marathon best at the CPC Loop Den Haag in March, recording a time of 59:26 minutes for fourth place in a high calibre competition.

He won the Ras Al Khaimah Half Marathon with a time of 58:54, a new personal best and just two seconds outside the course record.

In 2015, he started off his year by winning the world cross country championships, beating Muktha of Ethiopia.

[26][27] On June 27, 2020, Kamworor was hit by a motorcycle while out on a daily run resulting in a tibia fracture that required surgery.

[28] In January 2021, he ran his first race since the accident, winning the 2021 Kenya Police Cross Country Championship 10k in a time of 29:22.