Dan J. Wittliff, P.E., DEE, F.NSPE, is the 2012–13 president of the National Society of Professional Engineers (NSPE) and the managing director of Environmental Services for GDS Associates in Austin, keeping complex and multiphase projects on schedule and within budget. An NSPE member since 1972, Dan has held varied volunteer leadership positions with the Society, including member of the Board of Directors and House of Delegates. Licensed as a professional engineer in Texas and Tennessee, Dan is a graduate of Southern Methodist University (SMU) where he earned a Bachelor of Science degree in mechanical engineering and membership in Pi Tau Sigma mechanical engineering honorary. He also holds a Master of Business Administration from the University of Oklahoma.

The National Society of Professional Engineers (NSPE) is an American professional engineering organization representing the voice of licensed engineers, and advocates for all related disciplines. The NSPE concerns itself with a variety of issues relating to engineering, including licensure and ethics, the image of the engineer, the rights of engineers at the national and state levels, news of the profession, and continuing education opportunities.