Expel is a cybersecurity company that provides managed detection and response services. The company was founded in 2016 and is headquartered in McLean, Virginia. Expel's services are designed to help organizations detect and respond to cyber threats in real-time. The company's platform combines human expertise with machine learning to provide a comprehensive approach to cybersecurity. Expel has received numerous awards for its innovative approach to cybersecurity and has been recognized as one of the best places to work in Virginia.