Prof. Wanjohi, chizvarwa chekuKenya mushure mekudzidza kwake kwekutanga, akaenda kuKenyatta University kwaakawana B.Ed, M.Sc neP.D. madhigirii. Muna 1989, akabatana neKenyatta University faculty uye akasimuka nepakati kusvika pachinzvimbo chiripo chepurofesa akazara wechirwere chezvirimwa. Prof. Wanjohi parizvino ndiye Ag. Vice Chancellor paKenyatta University uye Mutevedzeri wasachigaro weKenya National Academy of Sciences
Prof. Wanjohi anga ari pamberi mukusimudzira chirongwa cheSainzi kuburikidza nezvirongwa zvitsva zvakasiyana-siyana uye muutungamiri nemabasa ake ekutungamira mukati nekunze kweKenya. Mipiro iyi yakaita kuti acherechedzwe munyika yose nepasirese; ari a Fellow weRoyal Society of Biology; a Fellow yeKenya National Academy yeSainzi; a Fulbright Senior Research Fellow; ku Fellow -African Women in Agricultural Research and Development (AWARD) uye akazivikanwa seSainzi akasarudzika neFalling Walls Foundation kuGermany. Muna 2020, Prof Wanjohi aive mumwe wevakadzi makumi maviri vesainzi vakabuda mubhuku rinonzi "Enhancing girls participation in STEM: Inspiring Stories of African Women Scientists" rakabudiswa neForum for African Women Educationist (FAWE). Akagadzwa semurairidzi wevakadzi vari kusimukira vezvekurima vesainzi.
Iri peji rakagadziridzwa muna Chivabvu 2024.
