Kieni's origin can be traced back to the Mugaga Farmers Cooperative Society, located near Ndimaini town in Nyeri. Established in 1985, this cooperative consists of 1,500 dedicated farmer members who cultivate coffee cherries at altitudes ranging from 1700 to 1800 meters above sea level.

The Mugaga Farmers Cooperative Society, which covers an area with fertile red volcanic soil and favorable climatic conditions, Kieni is one of the coffee processing facilities. It begins with meticulous cherry selection, where only the finest cherries are carefully handpicked and sorted before pulping. The pulped coffee undergoes a dry fermentation process overnight, allowing the natural microflora to ferment the fruit sugars. Then, the coffee is thoroughly washed in specialized density sorting channels and subjected to the classic Kenyan "double soak" process by soaking in clean water. Factors like the coffee varieties, climate, soil quality, and meticulous processing, including the double fermentation, combine to produce exceptionally intense and flavorful profiles present within this Kenya microlot.

The parchment coffee then undergoes a drying phase on elevated beds for approximately 10-14 days. Once the parchment reaches the optimal moisture level, it is forwarded to the dry mill for milling and grading to ensure consistent quality.

Sustainability forms a central pillar of Kieni's ethos, demonstrated through initiatives like wastewater soak pits that prevent contamination of local water systems.
The cooperative extends its support to its members in various ways including assistance with sourcing seedlings, planting, weeding, pruning, spraying, and fertilizing. Additionally, technical guidance and farmer training programs provided by the Ministry of Agriculture contribute to the adoption of sustainable farming practices.

As part of the Mugaga Cooperative Society, Kieni actively contributes to the community by providing credit facilities for school fees, farm inputs, and advance payments, further enhancing the well-being of its members.