S & B Infrastructure, Ltd. (S&BI) has been in existence since 1994 as part of S & B Holdings, Ltd., (one of the largest priva ... tely-owned engineering firms in the State of Texas). S&BI provides planning, multi-discipline engineering design, and construction phase services in the following market sectors: transportation, federal, public works, pipeline and facilities. We provide services to public and private sector clients. We aspire to be the leader in providing quality professional design services and innovative, cost-effective solutions to meet our client’s expectations. We provide an ethical environment that empowers our employees to grow and contribute to the quality of life of the communities we serve. read more