What does CST stand for? In the literal sense it stands for civil, structural, and transportation, the primary disciplines that we provide. CST Engineering, Inc. (CST), is a multi-disciplined engineering firm that provides innovative solutions for civil, structural, and transportation projects. Our staff includes experienced professionals who have been collaborating on projects in Maryland, Virginia, Pennsylvania, and Delaware for nearly 20 years. Located in Columbia, MD, CST is well-positioned to serve Maryland and the surrounding states. CST is recognized as an Asian-American owned, Disadvantaged Business Enterprise and/or Minority Business Enterprise by the City of Baltimore, Maryland Department of Transportation, and Prince GeorgeÕs County, MD.