Tezira studied at the University of Nairobi in Nairobi, Kenya. In 1996 Tezira received a degree of the Bachelor of Science in Food Science Technology.
In 2004 Tezira became a Master of Science in Food Science Technology.
Tezira worked as an assistant factory manager in Unilever Tea Kenya Ltd., Kericho, Kenya from 1999 to 2000. Communications specialist International Livestock Research Institute, Nairobi, since 2006. Science communications consultant International Livestock Research Institute, Nairobi, 2003—2006.
Member Nairobi Pentecostal Church Young Professors, 2005. Member of Kenya German Academy Exchange Service Scholars Association (associate. Treasurer, Nairobi chapter 2003-2004).