My Suggestions

mũrũgamĩrĩri

n. · class 1/2

  1. supervisor; supervisor who oversees others' work or stands guard, person who serves as wedding attendant, bridesmaid, best man, or godparent in ceremonies

Example: "Risper Adhiambo niwe murugamiriri munene wa kambuni imwe ya njoohi guku bururini." — Risper Adhiambo is the senior manager of a tea company here in the country.