Omamo began her career as a lawyer in private practice and was the first female Chairperson of Law Society of Kenya from 2001 to 2003 after serving as a Council member. She was conferred with the rank and privilege of Senior Counsel in 2012. She was a member of the Task Force on the Establishment of
the Truth Justice and Reconciliation Commission for Kenya. Omamo was Kenya's first female ambassador to
France with accreditation to Spain,
Portugal, The Holy See and Serbia as well as the Permanent Delegate of the Kenya to
UNESCO. == Political career ==