Ms. Sibenac currently serves as Managing Director at BC Partners in portfolio operations. Before joining BC Partners in 2017, Ms. Sibenac held management positions at Amazon, Inc., a multinational technology and e-commerce company, from 2012 to 2017. Prior to that, Ms. Sibenac held technical and commercial leadership roles at Lockheed Martin Corporation, a security and aerospace company, from 2003 to 2010. Since November 2023, Ms. Sibenac has served on the board of directors of Madison Logic, Inc., a digital marketing company. She previously served on the boards of directors of Appgate, Inc., a cybersecurity company, from 2022 to 2024 and GFL Environmental Inc., a waste management company, from 2018 to 2020. Ms. Sibenac holds a Bachelor of Science degree in Mechanical Engineering from the University of Notre Dame and a Master of Business Administration degree from Harvard Business School. Ms. Sibenac s individual qualifications and background include knowledge of business operations, customer engagement and technology and in-depth knowledge of the e-commerce and retail industries.