Management Team

Mr. Quarles served as Executive Vice President and President, Acetyl Chain and Integrated Supply Chain at Celanese Corporation from 2015 to 2017. Prior to joining Celanese Corporation, Mr. Quarles held a variety of leadership positions at LyondellBasell Industries N.V., before serving as Senior Vice President of the Intermediates and Derivatives ("I&D") segment and the supply chain and procurement functions from January 2015 to June 2015. This time included serving as a member of LyondellBasell's Management Board from 2014 to 2015, Senior Vice President - I&D from 2009 to 2014, Senior Vice President Propylene Oxide and Derivatives from 2008 to 2009 and Vice President of Performance Chemicals from 2004 to 2008. Mr. Quarles began his career in 1990 at ARCO Chemical/Union Carbide, where he held various positions in sales, marketing and business management. Mr. Quarles earned a Bachelor of Science in Mechanical Engineering from Clemson University and an MBA from the Kellogg School of Management at Northwestern University.

Mr. Sami Ahmad has more than 25 years of experience in finance and accounting. From 1991 through 1998 he held various positions with ARCO Chemical Company including financial analysis, marketing, mergers and acquisitions, and investor relations. From 1998 through 2006 he worked for Lyondell Chemical Company as Director of Investor Relations, Assistant Treasurer, Corporate Finance and Director of Corporate Development. In December of 2007 Lyondell Chemical Company was acquired by LyondellBasell Industries, and Mr. Ahmad continued to hold the position of Director of Corporate Development. From 2009 to 2011 he was Vice-President and Treasurer of Exterran. He then served as Chief Financial Officer for Southwest Water Company, Inc. for approximately 10 months. From July 2013 through August 2016, Mr. Ahmad served as the Chief Financial Officer and Board member for Armada Water Assets, Inc.  He holds an undergraduate degree in Chemical Engineering from the University of Pennsylvania and an MBA from the University of Chicago.

Prior to joining Trecora, Mr. Silberman served from 2016 to 2020, as Vice President and Deputy General Counsel, & Assistant Secretary at Celanese Corporation, a Fortune 500 international diversified chemical company based in Dallas, Texas. In that role, Mr. Silberman served as the lead lawyer overseeing the legal affairs for both the global Acetyl Chain business and the global Supply Chain organization. Before Celanese, Mr. Silberman held several positions from 2004 to 2016 at FMC Corporation, a Fortune 1000 international diversified chemical company based in Philadelphia, Pennsylvania. While at FMC, Mr. Silberman served as Assistant General Counsel and Assistant Secretary during which he was the chief M&A and corporate counsel, and prior to that, served as division general counsel for FMC’s global Health and Nutrition division. Before FMC, Mr. Silberman worked for the law firms of Morgan, Lewis, Bockius LLP in Philadelphia from 2000 to 2004, and Blank Rome LLP in Philadelphia from 1996 to 2000, and as a Law Clerk and Court Mediator for the New Jersey Superior Court in Camden, New Jersey from 1995 to 1996. Mr. Silberman graduated with a Juris Doctor degree from Emory University School of Law, and a Bachelor of Arts degree with distinction from the University of Pennsylvania.  Outside of work, Mr. Silberman serves as Chairman of the Board of Directors for the American Red Cross - Dallas Fort Worth Chapter which serves over 7 million people.

Dr. Peter M. Loggenberg received his Bachelor of Science in Chemistry and Mathematics, Honors Degree in Chemistry, Master of Science in Physical Chemistry and a PhD in Chemistry (Catalysis). He was appointed to the office of Chief Sustainability Officer in March 2018. He was President of Trecora Chemical since the Company's acquisition of SSI Chusei, Inc. in October 2014 until his appointment to Chief Sustainability Officer. He served as President of SSI Chusei, Inc. from 2010 through 2014. He continued as President of Trecora Chemical upon the Company's acquisition. He has over 25 years of experience in the chemical industry with over 15 years at the corporate level.

Rafael “Ralph” Pons has over 35 years of extensive chemical manufacturing experience at some of the industry’s leading companies.  In February 2020, Mr. Pons joined the Company and initially served as the site leader at the Company’s South Hampton Resources facility in Silsbee, Texas.  In May 2021, Mr. Pons assumed the role of Chief Manufacturing Officer.  Prior to joining Trecora, Mr. Pons worked at Preferred Sands from 2018 until 2019, where he served as Vice President of Operations.  From 2016 until 2017, Mr. Pons worked for Celanese Corporation where he served as the site leader at the company’s manufacturing facility located in Clear Lake, Texas.  Prior to that role, Mr. Pons served as plant manager at Nalco Champion in Garyville, Louisiana from 2015 until 2016.  From 2013 until 2015, Mr. Pons held several different roles of increasing responsibility at Phillips 66.  From 1985 until 2013, Mr. Pons worked at Dow Chemical where he held several different roles of increasing responsibility.  Mr. Pons holds a Master of Science degree in Operations Management from the Rensselaer Polytechnic Institute and a Bachelor of Science degree in Chemical Engineering from the University of Virginia.