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As the second generation to lead MX Holdings, Mike Lefton has been with the company for the entirety of his career. In 1984 he started his career as a scrap buyer at Pennex Aluminum. Over the years, he has held a variety of key leadership roles, including Trader for Metal Exchange, leading the RSI/Dross business unit, and overseeing the Transportation/Logistics department. In 1998, Mike led the development of the company’s proprietary trading software, which is still in use today. After serving as CEO from 2010 to 2017, Mike transitioned to Executive Chairman, where he works alongside the CEO to set the company’s strategic direction and preside over the board of directors. ​

Mike holds a Bachelor of Science in Business Administration from the University of Missouri-Columbia and an MBA from Washington University. He is actively involved in the community, currently serving as Board President for Variety the Children's Charity of St. Louis and on the boards of Barnes Jewish Hospital, Big Brothers Big Sisters of Eastern Missouri, and the St. Louis Men's Group Against Cancer. ​

One of Mike’s favorite volunteer experiences is Variety’s Bikes for Kids program, where the Metal Exchange team builds bicycles for children with disabilities. He takes great pride in MX Holdings’ commitment to being people-focused and purpose-driven, ensuring that the company makes a positive impact on both its employees and the community. ​

Outside of work, Mike enjoys ice hockey, skiing, golf, traveling, and spending time with his family. His go-to karaoke song is “New York, New York,” and his favorite use of aluminum is sitting on an ice-cold bleacher seat while watching a hockey game.

Since joining MX Holdings in 2016, Matt Rohm has served in several key leadership roles, including Chief Financial Officer (2016-2021) and Chief Operating Officer (2022), before being named Chief Executive Officer in 2023. In his current role, Matt is responsible for serving the needs of over 700 employees across Metal Exchange, Pennex, and MX Holdings, ensuring the company’s continued success and growth. ​

Matt holds a Bachelor of Science in Industrial Engineering from Bradley University and an MBA from Washington University in St. Louis. Prior to joining MX Holdings, Matt served in leadership positions at companies that include Energizer Holdings, Sun Edison, and Anheuser-Busch, where he served for 11 years, including 9 years supporting Metal Container Corporation and leading beverage can sheet procurement.

In addition to his professional responsibilities, he serves as a board member for the Missouri Humane Society and is an Advisory Board Member for Live Inspired by John O'Leary. He encourages all MX holdings employees to get involved in the community, and one of his favorite volunteer experiences while at the company was being involved with the STL Cardinal Toys drive for BJC Children's Hospital. ​​

When it comes to MX Holdings, Matt takes pride in the company’s people, values, and culture. Outside of work, he enjoys walking his four dogs, golfing, cooking (particularly grilling and using his Blackstone), attending concerts, and, on occasion, singing his go-to karaoke song, "Pink Houses" by John Mellencamp. As for his favorite use of aluminum? Cans for cold beverages, of course!

Mark Butterfield joined MX Holdings in 2022 and currently serves as President of Manufacturing, overseeing end-to-end manufacturing operations, including casting, extrusion, fabrication, and assembly. He also leads the strategic pillars of safety, talent development, business development, financial and risk management, innovation, and operational excellence across MX Holdings’ manufacturing facilities.

Mark studied Mechanical Engineering at Miami University before starting his career as a CAD Operator, working in various technical roles before advancing to VP of Engineering at Magnode Corp. He later transitioned into operations and management, where he oversaw multi-site, vertically integrated plants focused on casting, extrusion, fabrication, and assembly. Before joining MX Holdings, he served as Managing Director of Aluminum at Shape Corp.

Mark is actively involved as a leader in the aluminum industry. He currently serves as Chairman of the Aluminum Extruders Council (AEC) and Co-Chairman of the ET Foundation. He has also held leadership roles such as Chairman of the Automotive Committee at AEC and has contributed as an editor for Light Metal Age.

What Mark values most about MX Holdings is the company’s commitment to its core values—Safety, Integrity, Caring, and Growth—and the genuine focus on developing people and community support. One of his favorite volunteer experiences at MX Holdings has been serving meals alongside company leadership.​

Outside of work, Mark enjoys contributing to his family’s seventh-generation working farm and spending time with family and friends. His favorite use of aluminum is knowing that his friends and family are safer on the roads due to Pennex products, such as bumpers and crush cans, which enhance road safety by providing crash absorption and protection in vehicles.

Trevor Hansen joined Pennex in 2024 as Chief Financial Officer, where he leads the Finance team in supporting the company’s manufacturing operations. Prior to joining Pennex, Trevor held several leadership roles, including serving as CFO of Kataman Metals from 2015 to 2024. He also spent over a decade with Anheuser-Busch, where he held positions such as President of Anheuser-Busch Recycling, Vice President of Packaging Procurement, and Vice President of Finance for the Packaging Division.

Trevor holds a Bachelor’s degree in History and Political Science from Miami University (Ohio) and an MBA with a concentration in Finance from Washington University in St. Louis.

Though new to Pennex, Trevor has quickly felt at home thanks to the welcoming team. Outside of work, Trevor enjoys spending time with his four children and, while a former triathlete, now prefers travel, hiking, and biking. When it comes to karaoke, he sticks to group performances, and his favorite use of aluminum? Beer cans, without a doubt!

Craig Zotkovich joined Pennex in 2023 as Director of Sales for the Automotive sector, where he is responsible for driving profitable sales growth within the automotive industry. With a focus on building strong relationships and expanding market opportunities, Craig brings extensive experience to his role.​​ Although Craig is new to Pennex, he appreciates the company’s guiding principles, which are clearly identified and followed throughout the organization.​​

Before joining Pennex, Craig held progressively senior roles in the aluminum extrusion industry, including Account Manager, Senior Account Manager, Sales Manager, and Director of Sales in the automotive sector. His experience in these roles has given him a deep understanding of the industry and the ability to lead successful sales strategies. Craig is also a member of the AEC Automotive Team.​​

Craig holds a Bachelor of Business Administration in Business Management from Eastern Michigan University and a Master of Science in Administration from Central Michigan University.​​

Outside of work, Craig enjoys spending time with his family, boating, skiing, and playing the occasional round of golf.  Craig particularly appreciates the aluminum extrusions used in the structure of his pontoon boat.​​

Shane Probst joined Pennex in 2024 as General Manager of Manufacturing Services. In this role, Shane leads a team of Directors responsible for safety, lean manufacturing, and equipment reliability across all Pennex facilities. He and his team are dedicated to initiating and implementing improvements that enhance safety, lean practices, and equipment performance. In his short time at the company, he has valued the family atmosphere and team-oriented approach at Pennex, which he finds crucial for effective problem-solving.

Shane holds a Bachelor of Science in Environmental Science with a minor in Biology and before joining Pennex, Shane gained extensive experience in manufacturing and operations management. Holding roles such as Plant Manager, Program Manager, General Manager of Operations, and Director of Manufacturing. His diverse background has equipped him with the skills to drive continuous improvements and foster a collaborative work environment.

Outside of work, Shane enjoys archery, fishing, and landscaping. His go-to karaoke song is The Gambler by Kenny Rogers, and he’s proud of his iPhone, which consists of 24% aluminum!