Mark Sebastian

Mark Sebastian has extensive experience in customer service and project management, currently serving in a semi-retired capacity at WinTech Inc. since September 2022. Prior to this role, Mark was affiliated with WINTECH as a professional in customer service and commercial credit since August 2016. Mark held the position of Principal at MFS Project Management Consultants, LLC from August 2009 to August 2016, providing project management services. Earlier in the career, Mark served as a Customer Service Manager at EFCO Corporation from June 2004 to August 2009 and as a Credit Manager at EFCO, a Pella Company, from 1982 to 2004.