Nyawira has worked in Kenya across various industries in Real Estate, Beverages, and Energy, overseeing the marketing and communications, sales, business development, IT and legal functions. She consulted on the setting up of a U.K. registered energy company that was developing its first power plant in Zambia.

Nyawira has a Bachelor of Law (LLB) and qualified as a solicitor in 2007. She also holds an MBA from ESSEC Business school in Paris, France.
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On completion of her MBA in 2012, she returned to consulting in the UK and France focusing on developing strategies and supporting companies expand outside their home markets, developing branding and positioning strategies. She worked in the beverages industry for 3 years before joining JCG Management in November 2019. ​

Nyawira sits on various boards and is the Chair of the Mount Kenya Wildlife Conservancy a non-profit organisation dedicated to the conservation of wildlife in Kenya. ​