HOUSTON — Linde Engineering North America Inc. (LENA) has formed a new petrochemicals business unit located in the Houston office, promoting Paul van Helmond as its director. He joined LENA in 2005 as business development manager and subsequently product manager, ethylene furnaces. Most recently, he has served as manager of process engineering. For more information, visit www.lindeus-engineering.com or call (610) 834-0300.