Ensuring effective communication in joint radio operations is paramount for coordinating response efforts across various agencies. This paper introduces "InterComm SDR," a Universal Software Defined Radio (SDR) solution designed to bridge the gap between different radio systems, facilitating seamless interoperability between Very High Frequency (VHF) and Ultra High Frequency (UHF) radios. The technical details of a successfully executed waveform are discussed, with a focus on leveraging open-source technologies and drawing from global implementations of SDR technology to electromagnetic spectrum operations.