Mr. Mionis is the President and Chief Executive Officer of Celestica Inc., a multinational leader in design, manufacturing, hardware platform and innovative supply chain solutions for a wide range of industries including aerospace, industrial and communications. Celestica’s solutions span design and engineering through to after-market services. Headquartered in Toronto, Canada, Celestica employs approximately 27,000 people across 40 locations in the Americas, Asia and Europe, and generated $9.7 billion in revenue in 2024. Mr. Mionis has served as Celestica’s CEO since 2015.

Prior to his role at Celestica, he was an Operating Partner/Senior Advisor in private equity at Pamplona Capital Management from 2013 to 2015 where he generated deal flow within the industrial/aerospace market and supported several companies across a range of industries, including industrial, aerospace, healthcare and automotive. From 2006 to 2013, he served as President and Chief Executive Officer of StandardAero, a global aerospace maintenance, repair and overhaul company, leading it through a period of significant revenue and profitability growth. He previously held senior leadership roles at Honeywell, culminating in his position as the Vice President Integrated Supply Chain for Honeywell Aerospace. Mr. Mionis began his career at General Electric and holds a Bachelor of Science degree in electrical engineering from the University of Massachusetts Amherst.