Mill Manager

The mill manager is a critical figure in the coffee supply chain, acting as the bridge between the farm and the export market. Whether managing a wet mill (where cherries are depulped and fermented) or a dry mill (where parchment is removed and beans are graded), the mill manager is responsible for the technical execution of processing. Their decisions directly impact the final flavor, moisture content, and physical quality of the coffee.

In a wet mill, the manager oversees the entire fermentation process. They must monitor variables like fermentation time, water usage, and pH levels to ensure the coffee develops the desired flavor profile without developing defects. They are also responsible for the drying stage, ensuring that coffee is turned regularly on raised beds or patios to reach the correct moisture target, typically between 10% and 12%.

In a dry mill, the manager's role shifts to physical preparation. This involves overseeing the hulling of parchment, the sorting of beans by size and density, and the removal of defects. A skilled mill manager uses equipment like gravity tables and optical sorters to ensure that the final product meets the specific "grade" required by international buyers. They are the final line of defense against defects like quakers or broken beans.

Why does this matter to the consumer? A great coffee can be ruined by poor processing. If a mill manager fails to control the drying process, the coffee may arrive with mold or become "stale" before it is even roasted. Conversely, a talented manager can elevate a good harvest into a world-class microlot through precise fermentation and meticulous sorting.

In practice, the mill manager is a technician, a scientist, and a logistics expert. They must manage labor, maintain machinery, and keep detailed records of every lot that passes through their facility. When you enjoy a clean, vibrant cup of coffee, you are often tasting the result of the mill manager's dedication to precision and quality control.