AL-Huntsville, Principal Scrum Master Huntsville, AL MUST: Experienced Scrum Master Possess an Active Top Secret clearance. Certified Scrum Master (CSM) or Professional Scrum Master (PSM 1) certified 9+ years of working experience. 5+ years working in an Agile team. 3+ years in a software development environment. Thorough knowledge of agile principles, practices and methods Practical experience of servant-leader