Guilherme C. Gerdau Johannpeter became the president of Gerdau Long Steel North America in June 2011. In this role, he leads the larger of the two Gerdau operations in North America.

Mr. Johannpeter has extensive experience with the company and has held several leadership positions in Brazil and the U.S. Most recently, he served as the leader of Gerdau Special Steel North America, where he led the business division through a tremendous period of growth from 2008 to 2011. Prior to that, he was vice president of SBQ and wire rod operations at Gerdau Long Steel North America and joined the Gerdau Long Steel North America Executive Committee, accumulating responsibilities for part of downstream operations and the specials division. He first relocated to the U.S. in 2006, when he joined Gerdau Long Steel North America as marketing director. In Brazil, he served as the marketing and planning director for the service center division of Gerdau and led the civil construction and fabrication divisions.

Mr. Johannpeter is a board member of the Steel Manufacturers Association and the American Iron and Steel Institute. He holds a commercial law degree from Unisinos University in Brazil and an MBA with double majors in Marketing and Finance from Northwestern University's Kellogg Graduate School of Management in Evanston, Ill. He is married with a son and a daughter and lives in Tampa, Fla.

Rodrigo Souza serves as vice president of finance for Gerdau Long Steel North America. In this role, he is responsible for financial planning and analysis, accounting, treasury, risk management, expense management and shared services.

Mr. Souza has more than 20 years of experience working with Gerdau. He began his career in 1991 as a treasury analyst at Gerdau’s corporate headquarters in Porto Alegre, Brazil. Six years later, he moved to Canada, where he served as a credit, capex and mergers and acquisitions analyst at the Gerdau still mill in Cambridge, Ontario. He returned to Brazil in 1998 to serve as the corporate treasurer. In 2008, Rodrigo moved to Spain to work as the chief financial officer for Gerdau’s special steel operations.

Mr. Souza earned a degree in economics from Pontifícia Universidade Católica do Rio Grande do Sul in Porto Alegre. In addition, he holds a specialization in international economics that he received from Universidade Federal do Rio Grande do Sul, also located in Porto Alegre.

Jim Kerkvliet serves as Gerdau Long Steel North America's vice president of sales & marketing. In this role, he is responsible for all domestic mill sales operations, international commercial sales operations and commercial marketing.

Mr. Kerkvliet has more than 25 years experience in the international steel realm and possesses vast knowledge of international and North American sales strategy. Prior to his current position, he held various senior leadership positions throughout his career, including general manager for the company's downstream non-fabrication operations. Before joining Gerdau, he worked within the leadership of companies such as Cargill Ferrous International and Cargill Steel & Wire, as well as being responsible for regional sales at North Star Steel.

Mr. Kerkvliet received his undergraduate degree from the College of St. Thomas in marketing management.

Matthew Yeatman serves as vice president of raw materials for Gerdau Long Steel North America. In this role, he is responsible for all raw materials purchases of scrap and iron substitutes. He is also responsible for the company's recycling division, which includes 17 scrap processing operations in the U.S. and Canada.

Mr. Yeatman has 26 years of experience as part of Gerdau and its predecessor companies. He held several operational and commercial positions in the raw materials divisions prior to his current role.

Mr. Yeatman was born and educated in Ontario, Canada.

Carl Czarnik serves as Gerdau Long Steel North America's vice president of human resources. Through more than 20 years of experience in leadership roles, he gained a floor-to-ceiling knowledge of personnel management within the steel industry.

Mr. Czarnik began his career in steel as a management trainee with North Star Steel in Monroe, Mich. He held various positions in a wide array of steel functions including melt shop operations, casting and works management prior to entering into a senior management position as a plant manager. Since joining Gerdau in 2004, he has served as vice president and general manager at the steel mill in Wilton, Iowa, and vice president and regional manager of several locations. He accepted his current position in 2009.

In addition to his extensive steel industry experience, Mr. Czarnik served as an executive officer in the U.S. Army for seven years during which he served in active duty in the first Gulf War.

Mr. Czarnik received his Bachelor of Science degree in chemical engineering from Rose Hulman Institute of Technology.

Yuan Wang serves Gerdau Long Steel North America as vice president of mill operations. In his role, he is responsible for ensuring that all mills across the company operate efficiently and improve continuously. He is also in charge of the integration and implementation of the Gerdau Business System and the development of quality systems.

Mr. Wang has more than 20 years of experience within Gerdau. His career started in Riograndense, Brazil, in March 1987. He has worked across a broad range of steel operations including scrap, melt shop, casting and refractory operations, and numerous business operation support systems.

Prior to joining the executive team of Gerdau Long Steel North America, Mr. Wang held various senior level positions including senior process engineer, plant operations manager, vice president and general manager of the company's Manitoba Rolling Mill and executive director & chief representative for Gerdau's special steel operations in Shanghai, China.

Mr. Wang has worked for Gerdau in operations in Brazil, Canada, China and the U.S.. He is fluent in English, Portuguese and Mandarin Chinese.

Mr. Wang is a graduate of Universidade Federal do Rio Grande do Sul, where he majored in metallurgical engineering.

Peter Campo serves as Gerdau Long Steel North America's vice president of downstream operations. He is responsible for the company's rebar fabrication, rail products, wire products and Bright Bar businesses.

Dr. Campo joined Gerdau in May 2008 as the vice president of procurement and sales & operations planning. In this position, he was in charge of the development and execution of the company's supply chain processes. In March 2010, he was named the vice president and general manager of rebar fabrication and led fabrication operations in the northern U.S.

Prior to joining Gerdau, Dr. Campo worked for General Electric for 18 years in global roles in research and development, manufacturing, engineering, quality, business development and supply chain management.

Dr. Campo holds a Ph.D. in Chemical Engineering from the California Institute of Technology and a Bachelor of Science degree from Rice University. He is a certified Six Sigma Master Black Belt.