In 2009, he joined Strathmore University, Nairobi, and pursued a bachelor's degree in Business Information Technology (BBIT) graduating in April 2013.

With that training, he began his career in earnest booking roles on several Kenyan television and film productions such as Higher Learning, Lies That Bind, Nairobi Half Life, Noose of Gold and Rush.

In 2014, he starred alongside Mumbi Maina, Brian Ogola, Lizz Njagah and Sarah Hassan on Maisha Magic East Drama Jane and Abel.

In 2015, he starred alongside Gerald Langiri on comedy Fundi-Mentals, a role that saw him clinch the 2015 Kalasha Award for Best Supporting Actor.

[3][4] In 2015, Karumi ventured into TV hosting, taking part in the KTN The Presenter Season 2 talent search finishing in the final 10.