The problem of designing dynamic output feedback compensators to achieve arbitrary polo assignment in linear multivariable systems is considered. By extending a reeent pole assignment technique using constant output feedback to include dynamic output feedback, a procedure is developed for the design of unit rank dynamic compensators for arbitrary pole placement. The design is carried out entirely in the frequency domain and the key step in the design is the formation of a set of linear equations relating the parameters of the compensator to the desired closed-loop characteristic polynomial. The problem of assigning the poles of the compensator which achieves arbitrary pole placemont is also considered.