Miguna was born in Magina Kenya. He attended Apondos Primary School in Magina Village-Nyando before proceeding to the prestigious Njiiri School in Muranga for his high school and then the where he became a student leader in 1986 and 1987.
From 2009 to 2011, He was the senior adviser on coalition, constitutional and legal affairs to the Prime Minister of the Republic of Kenya. I also served as the Joint Secretary to the Permanent Committee on the Management of Grand Coalition Affairs. I represented the ODM and Mr. Odinga during the constitutional review process in addition to participating in other important functions of state and government.