Mathira MP Rigathi Gachagua was born in Ruguru, Mathira constituency, Nyeri county 56 years ago.
He is a brother of former Nyeri Governor, the late Nderitu Gachagua.
Their parents were Martha Kirigo Gachagua and Mzee Nahashon Gachagua Reriani
He joined Kabiruini Primary School for his Certificate of Primary Education between 1971 and 1977, before proceeding to Kianyaga High School for his O and A-levels until 1983.
Rigathi joined the University of Nairobi in 1985 and graduated with a Bachelor of Arts Degree in Political Science and Literature in 1988.
Upon graduation, he was employed as an assistant secretary in the Ministry of Home Affairs where he worked between 1989 and 1990.
In 1990, he was recruited as a District Officer cadet and underwent training at the Administration Police Institute (Paramilitary Training) and the Kenya School of Government (Advanced Public Administration Course 1999-2000).
He served in the Provincial Administration as a DO for 14 years in various areas, among them Kirinyaga, Kiambaa, Limuru, Ng’arua, Kakamega and Garissa, with a short break as PA to Head of Public Service (1991-93).
Between 2001 and 2006, Rigathi was the PA to Uhuru Kenyatta, then Leader of Opposition.
When Uhuru was appointed Minister of Finance and Deputy Prime Minister, Rigathi left to do business. He is linked with Ridor Group of Companies and Wamunyoro Investments Limited, among others under the DCI radar.
He joined politics in 2017, when he was elected Mathira MP on the Jubilee Party ticket.