Pennsylvania Alpha is located at Lehigh University in Bethlehem, Pennsylvania. The Tau Beta Pi Association, national engineering honor society, was founded at Lehigh University in 1885 by Dr. Edward Higginson Williams, Jr., "to mark in a fitting manner those who have conferred honor upon their Alma Mater by distinguished scholarship and exemplary character as undergraduates in engineering, or by their attainments as alumni in the field of engineering, and to foster a spirit of liberal culture in engineering colleges."

A member of Phi Beta Kappa, the first established honor society, he was head of the mining department of Lehigh University when he determined to offer technical men as good a chance of recognition for superior scholarship in their field as that afforded by Phi Beta Kappa in the liberal arts and sciences.

Working alone he conceived an organization, gave it a name, designed its governmental structure, drew up its constitution, prepared its badge and certificate, established its membership requirements, and planned all the necessary details for its operation including the granting of chapters and the holding of conventions.

Late in the spring of 1885 he invited the valedictorian of the senior class, Irving Andrew Heikes, to membership and he accepted, becoming the first student member of Tau Beta Pi.

Since the founding of the Michigan Alpha chapter, Tau Beta Pi has grown steadily; There are now collegiate chapters at 234 US colleges and universities, and active alumnus chapters in 16 districts throughout the country, and a total initiated membership of more than 500,000.