Start Date: Immediate Keyword's: #chelmsfordjobs; #rfengineerjobs **Must have an interim or active a DoD Secret Clearance** Our client is a global security and aerospace company that employs approximately 114,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems, products, and services. *Expertise with RF subsystem and hardware including antennas, transmitters, receivers, microwave components, low noise amplifiers, high power amplifiers, advanced electronic modules, amplifiers, mixers, switches, frequency generation circuits and/or frequency conversion circuits is desired.