Onesimus Kipchumba Murkomen (born 12 March 1979) is a Kenyan lawyer and politician serving as the Cabinet Secretary for Ministry of Interior and National Administration.

[2] Murkomen is an Advocate of the High Court of Kenya and a three-time elected Senator of Elgeyo Marakwet County.

Murkomen won the seat with a 141,091 votes against his competitor former Elgeyo-Marakwet County governor Alex Tolgos who vied under the Jubilee Party and came second.

Murkomen was reported to send insulting short text messages to committee members for demanding the documents.

[16] In February 2016 Anne Waiguru filed an affidavit in court claiming Murkomen and William Ruto's then aide as Deputy president Farouk Kibet were part of a larger cartel that stole money from the NYS scam using fraudulent tendering.

[17] In April 2016 Anne Waiguru and another suspect in the scam Josephine Kabura filed further affidavits claiming that Murkomen had warned them to tell DCI to drop the investigations or face unspecified consequences.

[19] In May 2020 a Nairobi High court found that the Public Accounts committee of Parliament of Kenya had no power to recommend to the DPP to prosecute the matter as its not an investigative agency.