美国石灰矿业 USLM

Mr. Byrne, age 68, rejoined us on December 8, 2000 as our President and Chief Executive Officer, positions he previously held during 1997 and 1998. Mr. Byrne has served as a director since 1991, and served in various positions, including Senior Vice President and Chief Financial Officer and Vice President of Finance and Administration, from 1990 to 1998. Prior to rejoining us in 2000, Mr. Byrne was president of an Internet services and communications company focused on strategy, marketing and technology. The board selected Mr. Byrne to serve as a director because he is our CEO and has been with the company for more than 35 years in various operational and financial positions. Mr. Byrne is a past president of the National Lime Association.

Mr. Wiedemer, age 57, joined us in 2017 as our Vice President and Chief Financial Officer. He has over 25 years of financial and accounting experience. Mr. Wiedemer is a certified public accountant and served as corporate controller for TearLab Corp., an in vitro diagnostic medical device company, from 2015 to 2017. From 2009 to 2015, Mr. Wiedemer held various positions, including corporate controller and chief accountant, at Peerless Manufacturing Company (PMFG), a provider of separation and filtration equipment primarily serving the oil and gas and power generation industries. Prior to joining PMFG, Mr. Wiedemer was an audit manager with Grant Thornton.

Mr. O'Neill, age 42, joined us in 2008 as the Quality Control Manager of Arkansas Lime Company. From 2012 until 2023, Mr. O'Neill served as the Vice President and Plant Manager of Arkansas Lime Company where he was responsible for all on-site operations, including major capital projects and customer interfacing. He was promoted to Vice President - Production in 2023. Mr. O'Neill began his career in the lime industry at Linwood Mining where he was a quality control chemist.

Mr. Stone, age 60, joined us in 2018 and was promoted to our Vice President - Sales and Marketing in 2022 after serving as our Director - Sales and Marketing since 2019. Prior to joining us, Mr. Stone spent 18 years at Martin Marietta Materials, Inc. in various positions, including district quality control manager and sales manager with markets serving the construction and flue gas desulfurization industries.

Mr. Gagnon, age 56, joined us in 2014 as our Technical Sales & Business Development Representative and in 2022 was promoted to Vice President - Business Development. He has more than 28 years of experience in the mining industry. Prior to 2014, Mr. Gagnon held various plant, sales, and operations management positions with Martin Marietta Materials, Inc.

Mr. Hawkins, age 69, has served as a director since November 2022. He retired from Atmos, a natural gas utility company, in 2019 after serving in various positions for 22 years. His last position was President of the Louisiana Division of Atmos from 2005 until 2019, where he had overall responsibility for all operations in Louisiana, including marketing, construction and service, regulatory compliance, legislative, accounting and budgeting, human resources, and public affairs. He previously served as the President of the West Texas Division of Atmos from 2000 to 2005. Mr. Hawkins was a member of the board of directors of Woman's Hospital of Baton Rouge, Louisiana, a not-for-profit specialty hospital, from 2011 to 2019, and Heritage Propane, a national propane distributor, from 2000 to 2003. He was also an audit manager for Arthur Andersen, LLP in Nashville, Tennessee.

Ms. Duhe, Ph. D., MBA, age 57, has served as a director since August 2022. She has served as managing director of Duhe Ventures, LLC, an executive education and publishing firm, since 2024, and, from 2012 to 2024, was a professor and chair of the Division of Corporate Communication and Public Affairs at Southern Methodist University in Dallas, Texas. Ms. Duhe has also served as an independent consultant for CCA, Inc., a communication consulting firm, since 2017. From 1990 to 2004, she was employed by three multinational energy sector companies, the most recent company being ExxonMobil, serving in various roles, including: financial analyst; public affairs manager; vice president of Travel Guide Holdings, Inc., an ExxonMobil subsidiary; corporate brand manager; and corporate spokesperson at ExxonMobil's headquarters.