This paper describes a design methodology for parasitic electromagnetic emission reduction. The method exploits the flexibility brought by handshake based communication mechanisms implemented in asynchronous circuits. It starts from a structural description of the circuit, which is then refined according to the communication protocol used and annotated with operator latencies and current consumption. Force Directed Scheduling is then applied on the refined and annotated structural model of the circuit to determine the set of delays that have to be inserted in the handshaking protocols in order to minimize the peak-current without increasing the latency of the critical path. Applied to a Finite Impulse Response filter, the method enabled a 9dB reduction of the peak-current.