Rassini Chassis Systems on Magda Drive in Montpelier, will be permanently closing its doors in October. Approximately 70 employees are expected to be terminated within the month and by Dec. 31. Rassini is an international company that provides engineering solutions for suspension, brakes and anti-vibration systems for the automotive industry. The company has locations in Brazil, the U.S. and Mexico. A changing marketplace, the reason for the closure, company officials say.