William (Bill) Siwek has served as President of TPI Composites since May 2019 and assumed the role of Chief Executive Officer and was elected to the Board of Directors in May 2020. Bill started with TPI as our Chief Financial Officer in 2013. He previously served as the Chief Financial Officer for T.W. Lewis Company, an Arizona-based real estate investment company, Executive Vice President and Chief Financial Officer of Talisker Mountain, Inc., a real estate development company based in Park City, Utah and President and Chief Financial Officer of the Lyle Anderson Company, an Arizona-based real estate developer. Bill started his career with Arthur Andersen where he spent 18 years and was a Partner in both Audit and Business Consulting Divisions. Bill holds B.S. degrees in Accounting and Economics from University of Redlands, where he also served on the Board of Trustees and is currently on the Board of Directors of the American Clean Power Association.

Ryan Miller joined TPI as Chief Financial Officer in May 2022. Prior to joining TPI, he was the Vice President and Chief Financial Officer of the Avionics Division of Collins Aerospace from November 2018 to February 2022. Mr. Miller served as the Vice President and Controller of the Commercial Systems Division of Rockwell Collins from April 2017 to November 2018 and Vice President, Investor Relations from October 2013 to April 2017. He served in various financial leadership roles at Rockwell Collins prior thereto and worked for Deloitte & Touche LLP as an audit manager. Mr. Miller holds a Bachelor of Arts degree in Accounting from the University of Northern Iowa and a Master of Business Administration from the University of Tennessee.

Chuck Stroo joined TPI as Chief Operating Officer in Nov of 2023. Prior to joining TPI, he spent almost 24 years with Collins Aerospace. Mr. Stroo served as the Vice President of Power & Controls Operations. In this role Mr. Stroo was responsible for creating the strategic direction and execution for 31 sites in 10 countries supporting a multi-billion dollar business. Prior to that, he served in a similar role as the Vice President of Avionics Operations. Chuck has his MBA from St. Ambrose University and his Bachelor of Science in Electrical Engineering from Iowa State University. He is also a Board Member for Kirkwood Community College.

Theo Gibson joined TPI in September of 2019 as Chief Information Officer. Prior to joining TPI, Mr. Gibson spent 20 years with Honeywell. Most recently, Mr. Gibson was the Vice President of Information Technology and CIO Enterprise Applications for Corporate. Prior to this Mr. Gibson spent three years as the Vice President of IT and CIO Process Solutions. Mr. Gibson also spent two years on an expat assignment in Switzerland where he led IT for Build and EMEAI for the Aerospace Division. Prior to that, Mr. Gibson held various leadership roles in IT for multiple divisions in various locations from 1999 – 2012. Prior to Honeywell, Mr. Gibson also spent time working for Coca Cola and AMP Inc. Mr. Gibson has his Master of Science (MBA) in Management from the Georgia Institute of Technology and his BS in Industrial Engineering from West Virginia University.

Steve Fishbach has served as our General Counsel since January 2015. Prior to joining TPI, Mr. Fishbach served as SVP, Deputy General Counsel of Global Cash Access Holdings, Inc. (NYSE: GCA) since 2009 and in various senior roles in the legal department of Fidelity National Information Services, Inc./eFunds Corporation (NYSE: FIS) from 2005 to 2008. Prior to that, Mr. Fishbach practiced corporate and securities law at Squire Sanders (now Squire Patton Boggs) and other law firms in Phoenix, Arizona. Mr. Fishbach holds a B.A. degree in American Studies from Georgetown University and a juris doctor degree from William & Mary Law School.

Nicholas Warchol joined TPI in 2007 as a Senior Engineer and in November 2023 was promoted to Senior Vice President, Technology & Engineering. Most recently Nicholas was the Vice President, Global Technical Program Management, a role he has held at TPI since early 2020. Since assuming the VP role, Nicholas has focused on increasing the upstream collaboration with our customers and has been leading the Factory 2.0 project. Nicholas was previously the Global Technical Program Director for Vestas and before that he was the Engineering Director for China, responsible for all engineering and tooling activities, while supporting multiple customers during a period of rapid growth for TPI. Nicholas has a BS in Material Science Engineering from the Ohio State University and an MBA from St Ambrose University.

James Schimanski joined TPI in May of 2016 as our Vice President of Global Supply Chain and was promoted to Senior Vice President of Global Supply Chain in May of 2020. James comes to TPI with over 25 years of experience in the Energy and Renewable businesses. Prior to joining TPI, he was the Vice President of Supply Chain for Ogin Energy and held leadership roles in Supply Chain for Alstom Power Wind and GE Energy Wind businesses. Over his extensive career with Alstom Power and General Electric, Mr. Schimanski has held various positions in supply chain, operations, manufacturing, materials, and quality in both the U.S., Europe and Asia.   

He received his bachelor’s degree in business management from Russell Sage College and is a Six Sigma Certified Master Black Belt.