Martin Midstream Partners L.P. Announces Retirement of VP Jeff Posey; Michael Lawrence to Lead Sulfur and Fertilizer Services
Martin Midstream Partners L.P. (NASDAQ: MMLP) today announced the retirement of William “Jeff” Posey, Vice President of Fertilizer, effective December 31, 2025. Following his retirement, Michael W. Lawrence, Senior Vice President – Sulfur Services, will assume responsibility for Martin’s fertilizer division, consolidating the company’s sulfur and sulfur-based fertilizer operations under his leadership.
A Distinguished Career: Jeff Posey
Jeff Posey has dedicated more than 25 years of service to Martin Midstream Partners, making significant contributions to the company’s fertilizer business and overall growth. Posey joined Martin in December 1999 as Fertilizer Sales Manager for the Southern Region, where he quickly became recognized for his industry expertise, leadership skills, and commitment to customer service.
In 2013, Posey transitioned to General Manager of the fertilizer division, overseeing operations and commercial activities with a focus on efficiency, quality, and customer satisfaction. Under his leadership, the division strengthened its position in the market and maintained a reputation for reliability and excellence. In June 2019, he was promoted to Vice President of Fertilizer, a role in which he continued to advance the company’s strategic objectives and operational performance.
Bob Bondurant, President and Chief Executive Officer of Martin Midstream GP LLC, the general partner of MMLP, reflected on Posey’s contributions:
Jeff has had a distinguished career spanning over two decades of leadership and service to the company. He has led with integrity, deep industry expertise, and an unwavering commitment to the success of Martin’s sulfur-based fertilizer division. I extend my deepest gratitude for his years of service, leadership, and dedication.
Industry Leadership and Community Engagement
Throughout his career, Posey remained actively engaged in industry leadership and professional development. He served as a dedicated member of The Fertilizer Institute, Texas Ag Industries, and the Southwest Fertilizer Conference, where he contributed to the planning committee. His involvement in these organizations helped foster innovation, collaboration, and knowledge sharing across the fertilizer industry.
Posey’s contributions to the community and the broader agricultural sector further underscore his commitment to advancing the industry while supporting Martin’s partners and customers. His leadership helped guide both operational strategy and industry best practices, leaving a lasting impact on colleagues and peers alike.
Strategic Leadership Transition: Michael Lawrence
Following Posey’s retirement, Michael W. Lawrence will assume responsibility for the fertilizer division while continuing to lead Martin’s sulfur services. This strategic organizational move consolidates Martin’s sulfur and sulfur-based fertilizer operations under one experienced executive, aligning commercial, technical, and operational capabilities for greater efficiency and growth.
Lawrence brings a wealth of experience to this expanded role. He joined Martin in July 2008 as General Manager of the Sulfur Services division after nearly a decade at Koch Industries in the sulfuric acid group. In May 2011, he was promoted to Vice President – Sulfur and later advanced to his current position as Senior Vice President – Sulfur Services.
Lawrence holds a B.A. in Communications from the University of Kansas and has a distinguished record of leadership in the sulfur industry. His extensive experience spans more than 27 years in sulfur and sulfuric acid operations, combining operational expertise with a deep understanding of commercial strategies and customer needs.
Industry Involvement and Leadership
Michael Lawrence is a respected figure in the sulfur industry and has been actively involved with The Sulphur Institute. He has served in numerous leadership roles, including two-year terms as Vice Chair, Chair, and Immediate Past Chair. Since 2009, Lawrence has been a member of the Board of Directors and the Executive Committee, contributing to the organization’s mission of advancing sustainable sulfur production, trade, and application.
Lawrence’s broad industry experience and leadership roles equip him to drive innovation, operational efficiency, and strategic growth across both sulfur and fertilizer operations at Martin.
Strategic Alignment and Future Growth
The consolidation of the fertilizer and sulfur divisions under Lawrence’s leadership is part of Martin Midstream Partners’ broader strategy to maximize operational synergies and enhance commercial activities. By combining these divisions, the company can more effectively leverage technical expertise, streamline processes, and provide consistent, high-quality service to customers.
Bob Bondurant emphasized the importance of this transition:
With over 27 years of experience in the sulfur and sulfuric acid industries, Mike is the obvious candidate to lead Martin’s commercial sulfur and fertilizer businesses. This organizational alignment allows us to fully leverage the technical and operational synergies between our sulfur and fertilizer divisions. Mike’s proven leadership, his industry expertise, and commitment to excellence will provide consistency for our business partners and strategically position this core segment for continued success.
Legacy and Impact
Jeff Posey’s retirement marks the conclusion of a remarkable career that has left a lasting legacy at Martin Midstream Partners. From his early days in sales management to leading the fertilizer division as Vice President, Posey has contributed to the growth and success of Martin while fostering strong relationships with customers, colleagues, and industry partners.
Under Michael Lawrence’s leadership, Martin aims to build on this foundation, continuing to innovate and expand in both sulfur and fertilizer markets. The company remains committed to operational excellence, customer satisfaction, and sustainable growth in the years ahead.
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