This opportunity seeks to develop human-relevant, in vitro neuromuscular junction (NMJ) platforms to measure botulinum neurotoxin (BoNT) potency and evaluate medical countermeasures, aiming to reduce reliance on current mouse-based bioassays. The work specifically requires systems capable of demonstrating recovery of neuronal signaling to assess countermeasures. The performing location and budget information are not specified in the provided description.