Microbial networks are everywhere on earth and are responsible for many different processes. One of the processes that can be performed by microbial networks in syngas fermentation – the conversion of CO, CO2, and H2 into medium chain carboxylic acids. From itself, microbial networks are reliable and robust, making them a viable option for production processes. However, selectivity of the products is still challenging. On the other hand, monocultures and synthetic co-cultures that can ferment syngas have a higher product specificity, but lack the robustness of microbial networks. In Micro-net, I will use both top-down and bottom-up approaches to utilize the strengths of both microbial networks and synthetic co-cultures. This way, I will aim to construct more robust, efficient, and product-selective synthetic co-cultures to convert syngas into medium chain carboxylic acids.