As a truss designer, your duties are to design truss systems for commercial and residential buildings. You create layouts and drawings for floor and roof plans by hand and with AutoCAD or other design software, and discuss changes in designs with architects, engineers, and other designers. Your responsibilities also include working closely with client or customers to determine the types of designs they want for a building. In addition to these duties, you perform a variety of administrative and clerical tasks, such as developing reports, updating designs, and filing blueprints.