The paper suggests a method to design sliding sector control for a class of nonlinear systems in which the system trajectories are kept around a nonlinear sliding surface. The sliding surface is designed by using State Dependent Riccati Equations where Algebraic Riccati Equations are solved for frozen system states. The solutions are used to create the nonlinear (or state dependent) sliding surface around which state dependent sliding sectors are formed. The nonlinear system trajectories are forced inside the sliding sector by using the so-called sliding sector control. The method is illustrated by applying it to a nonlinear inverted pendulum model.