Agricultural engineers use their knowledge to solve the problems of farmers and the agricultural industry. They work to improve the quality and increase the production of farm products. Most agricultural engineers work for manufacturing companies that design and supply equipment. In these companies engineers work in sales, research and development, marketing, advertising, and management. Some engineers teach in colleges and universities. Others work as technical writers and editors for agricultural publications. Engineers also do extension service work or work for banks or insurance companies. A few are self-employed as consultants to farmers, manufacturers, and government agencies.

Agricultural engineers generally specialize in one of five major areas: farm structures, mechanical power, electrification, soil and water conservation, and food engineering. Engineers who work in farm structures design farmhouses, barns and other animal shelters, and crop storage facilities such as silos and granaries. In addition, they plan sanitation, ventilation, and heating systems for these buildings. Agricultural engineers also design power machines used on farms for land tilling, insect control, fertilization, and harvesting.