Corporate Governance
William E. Siwek President & CEO, Director
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 Chief Financial Officer
Chuck Stroo Chief Operating Officer
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.
Deane Ilukowicz Chief People Officer
Deane Ilukowicz has recently been promoted to the role of Chief People Officer. Ms. Ilukowicz previously held the position of Senior Vice President – Global Human Resources and prior to that, joined TPI as our Vice President of Global Human Resources in 2016. Prior to joining TPI, she was the Vice President of Organizational Effectiveness at TransUnion, Chief Human Resources Officer for Hypertherm, and held senior level roles at other financial services and manufacturing companies. Ms. Ilukowicz has an MBA from Wake Forest University and her bachelor’s degree in Social and Behavioral Science from The Johns Hopkins University. She also served as a Trustee for the Community College System of New Hampshire and provides free HR Consulting to nonprofit organizations.
Executive Sponsor, IDEA Council
Neil Jones Chief Quality Officer
Neil Jones joined TPI in August of 2023 as Chief Quality Officer. Prior to becoming an independent adviser/consultant, Neil spent well over a decade with Vestas Wind Systems in a variety of Quality leadership roles, with the last five years as Senior Vice President - Quality, Health, Safety and Environment. While with Vestas, Neil’s vision and leadership led to a significant improvement in the overall quality performance of the company, and he was instrumental in forging a strong quality culture. Before joining Vestas, Neil spent 20+ years in the Automotive Industry - nearly 2 decades at TRW Automotive later ZF Automotive with leadership roles in both the Engineering/Technology and Quality arenas - and later, in a senior quality leadership role at Eaton Automotive. Neil holds a bachelor’s degree with First Class Honours in Mechanical, Electrical and Fluid Dynamics Engineering from the University of Bath, Bath England and is a Six Sigma Blackbelt.
Adan Gossar Chief Accounting Officer
Theo Gibson Chief Information Officer
Steven Fishbach General Counsel
Nicholas Warchol Senior Vice President – Technology & Engineering
James G. Schimanski Senior Vice President – Global Supply Chain
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.
Thomas Adams Senior Vice President – Wind
Gökhan Serdar Senior Vice President – Turkey
In December 2021 Gökhan Serdar was promoted to Senior Vice President, Turkey. Gökhan joined TPI in 2014 as Chief Financial Officer of EMEA; he helped the turnaround and growth of the Turkey operations and the team. He was appointed as Vice President EMEA in 2019, played a key role in stabilizing and strengthening the Turkey operation and improving overall performance of the region. Under his leadership, the Turkey team has provided significant operational support to several of TPI’s other regions, most notably the India greenfield launch.
Prior to joining TPI, he served in several senior financial and operational positions within the Yasar Group companies, including bottled water, beverage, paint, food, and agribusiness operations. Prior to joining Yasar Group, Gökhan worked in public accounting for Arthur Andersen and Ernst & Young early in his career.
Gökhan holds a BS degree in Management, and he is a certified public accountant.